CN103096087A - Method and system of coding and decoding image and video - Google Patents
Method and system of coding and decoding image and video Download PDFInfo
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- CN103096087A CN103096087A CN2013100482813A CN201310048281A CN103096087A CN 103096087 A CN103096087 A CN 103096087A CN 2013100482813 A CN2013100482813 A CN 2013100482813A CN 201310048281 A CN201310048281 A CN 201310048281A CN 103096087 A CN103096087 A CN 103096087A
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Abstract
The invention provides a method and a system of coding and decoding image and video. At coding time, the method comprises steps of acquiring a maximum value and a minimum value of pixel component values in an original image or video, adopting the lossy compression method to compress the original image or a video to generate a compressed file or a code stream, wherein a part of coding data of the compressed file or the code stream contains the maximum value and the minimum value; generating and revising a coding end rebuilding image block or a video frequency frame so as to generate a new coding end rebuilding image block or a video frame. At decoding time, the method further comprises the steps of acquiring a maximum value and a minimum value from the compressed file or the code stream; generating and revising a decoding end rebuilding image block or a video frame so as to generate a new decoding end rebuilding image block or a video frame. According to the method, the value range of the pixel component values is limited in the step of generating the rebuilding image so as to improve coding efficiency and quality of image or video after decoding.
Description
Technical field
The present invention relates to image and audio/video encoding/decoding technical field in the signal processing, particularly a kind of image and video coding-decoding method and system.
Background technology
In image in signal is processed and video coding and decoding technology field, many digital pictures and video encoding and decoding standard are arranged, wherein, representative video encoding and decoding standard have MPEG-2, H.264/MPEG-4AVC, the autonomous standard A VS that formulates of China etc., representative image coding and decoding standard has JPEG and JPEG2000 etc.
Digital picture and video encoding and decoding standard have all been stipulated the span of each pixel component, for example 0～255.But in the application of the reality of prior art, the value of a width original image of concrete input or each pixel component of one section vision signal is not full of the whole interval of regulation, just a subinterval on interval usually.Existing digital picture and video encoding and decoding standard, it is all the scope of regulation that the span of each component of pixel is limited in the step that generates coding side reconstructed image or reconstruction frames and decoding end reconstructed image or reconstruction frames, do not have the scope according to the input signal of reality, reconstructed value is revised, this not only can bring larger distortion, also can make reconstructed image piece or the reconstruction video frame of the coded reference mistake of further part, make predicated error become large, thereby cause code efficiency to reduce.
Summary of the invention
The object of the present invention is to provide a kind of image and video coding-decoding method and system inaccurate to the correction of reconstructed value to solve prior art, the problem of bringing larger distortion and code efficiency to reduce.Owing to being all that span with each component of pixel is limited in whole interval in the decoding step of prior art, according to the scope of the input signal of reality, the span of each component of pixel is not revised, thereby caused image or video to produce the problem that larger distortion, encoding rate reduce.
For solving the problems of the technologies described above, the invention provides:
A kind of image and video coding-decoding method comprise: image and video coding method and image and video encoding/decoding method, wherein,
Described image and video coding method comprises:
Obtain maximum and the minimum value of the pixel component value in original image or video;
Adopt the lossy compression method method described original image of compression or video to generate compressed file or code stream, a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Generate the pixel component value of coding side reconstructed image piece or coding side reconstruction video frame according to the coded data of each image block in described original image or video or frame of video;
to be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame,
Described image and video encoding/decoding method comprise:
Obtain maximum and the minimum value of the pixel component value in original image or video from compressed file or code stream;
Pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
Will be greater than the maximum value of the reconstructed image block decoder or decoding side reconstructed video frame pixel component value is set to the maximum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component value will be less than the above the minimum block decoder or decoding side reconstructed image reconstructed video frame pixel component value is set to the minimum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component values greater than or equal to the minimum value and less than or equal to the maximum value of the reconstructed image block decoder or decoding side reconstructed video frame pixel component values remain unchanged as the new block decoder or decoding side reconstructed image reconstructed video frame pixel component values .
Optionally, in described image and video coding-decoding method, when described original image or video were black and white image or black and white video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of one-component; When described original image or video were coloured image or color video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of three components.
Optionally, in described image and video coding-decoding method, in the maximum of the pixel component value in obtaining original image or video and the step of minimum value, when the maximum of the pixel component value in obtaining original image and minimum value, described original image is added up; When the maximum of the pixel component value in obtaining original video and minimum value, the frame of video in described original video is added up.
Simultaneously, the present invention also provides a kind of image and video coding method, comprising:
Obtain maximum and the minimum value of the pixel component value in original image or video;
Adopt the lossy compression method method described original image of compression or frame of video to generate compressed file or code stream, a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Generate the pixel component value of coding side reconstructed image piece or coding side reconstruction video frame according to the coded data of each image block in described original image or video or frame of video;
Will be greater than the maximum value of the reconstructed image coding side terminal block or coded video frame reconstructed pixel component value is set to the maximum value as the new reconstructed image coding side terminal blocks or reconstructed video frame coded pixel component value will be less than the above the minimum coding side reconstructed image blocks or reconstructed video frame encoding side pixel component value is set to the minimum value as the new reconstructed image coding side blocks or reconstructed video frame encoding side pixel component values greater than or equal to the minimum value and less than or equal to the maximum value of the reconstructed image coding side terminal block or coded video frame reconstructed pixel component values remain unchanged as the new reconstructed image coding side terminal blocks or reconstructed video frame coded pixel component values .
Simultaneously, the present invention also provides a kind of image and video encoding/decoding method, and the described compressed file or the code stream that generate in described image and video coding method are decoded, and comprising:
Obtain maximum and the minimum value of the pixel component value in original image or video from compressed file or code stream;
Pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
Will be greater than the maximum value of the reconstructed image block decoder or decoding side reconstructed video frame pixel component value is set to the maximum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component value will be less than the above the minimum block decoder or decoding side reconstructed image reconstructed video frame pixel component value is set to the minimum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel components value will be greater than equal to the and less than or equal to the minimum value of the maximum reconstructed image block decoder or decoding side reconstructed video frame pixel component values remain unchanged as the new block decoder or decoding side reconstructed image reconstructed video frame pixel component values .
Simultaneously, the present invention also provides a kind of image and video coding and decoding system, comprising: image and video coding system and image and video decoding system, wherein,
Described image and video coding system comprises:
The first acquisition module is for maximum and the minimum value of the pixel component value of obtaining original image or video;
The first compression module is used for adopting the lossy compression method method described original image of compression or video to generate compressed file or code stream, and a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Coding side reconstructed image piece or coding side reconstruction video frame module are used for each image block or the coded data generation coding side reconstructed image piece of frame of video or the pixel component value of coding side reconstruction video frame according to described original image or video;
coding side reconstructed image piece or coding side reconstruction video frame correcting module, be used for and be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame,
Described image and video decoding system comprise:
The second acquisition module is used for obtaining from compressed file or code stream maximum and the minimum value of the pixel component value original image or video;
Decoding end reconstructed image piece or decoding end reconstruction video frame module are used for the pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
decoding end reconstructed image piece or decoding end reconstruction video frame correcting module, be used for and be set to described maximum greater than the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame, to be set to described minimum value as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame less than the decoding end reconstructed image piece of described minimum value or the pixel component value of decoding end reconstruction video frame, to remain unchanged as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame.
Optionally, in described image and video coding and decoding system, when described original image or video were black and white image or black and white video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of one-component; When described original image or video were coloured image or color video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of three components.
Optionally, in described image and video coding and decoding system, in the maximum of the pixel component value in obtaining original image or video and the step of minimum value, when the maximum of the pixel component value in obtaining original image and minimum value, described original image is added up; When the maximum of the pixel component value in obtaining original video and minimum value, the frame of video in described original video is added up.
Simultaneously, the present invention also provides a kind of image and video coding system, comprising:
The first acquisition module is for maximum and the minimum value of the pixel component value of obtaining original image or video;
The first compression module is used for adopting the lossy compression method method described original image of compression or video to generate compressed file or code stream, and a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Coding side reconstructed image piece or coding side reconstruction video frame module are used for each image block or the coded data generation coding side reconstructed image piece of frame of video or the pixel component value of coding side reconstruction video frame according to original image or video;
coding side reconstructed image piece or coding side reconstruction video frame correcting module, be used for and be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame.
Simultaneously, the present invention also provides a kind of image and video decoding system, comprising:
The second acquisition module is used for obtaining from compressed file or code stream maximum and the minimum value of the pixel component value original image or video;
Decoding end reconstructed image piece or decoding end reconstruction video frame module are used for the pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
decoding end reconstructed image piece or decoding end reconstruction video frame correcting module, be used for and be set to described maximum greater than the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame, to be set to described minimum value as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame less than the decoding end reconstructed image piece of described minimum value or the pixel component value of decoding end reconstruction video frame, to remain unchanged as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame.
A kind of image provided by the invention and video coding-decoding method and system, has following beneficial effect: in cataloged procedure, generate the pixel component value of coding side reconstructed image piece or coding side reconstruction video frame and it is revised generation new coding side reconstructed image piece or frame of video according to original image or video, thereby improving code efficiency; In decode procedure, the amount of calculation that does not increase decoder according to maximum and the minimum value correction of the pixel component value in original image or video, because decoder originally just need to be according to the maximum of theoretic pixel component value and the span of minimum value correction pixel component, after revising with method of the present invention, revised according to theoretic maximum and minimum value with regard to no longer needing, improved the quality of the rear image of decoding or video.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in accompanying drawing:
Fig. 1 is image and the video coding-decoding method schematic flow sheet of the embodiment of the present invention;
Fig. 2 is image and the video coding and decoding system structural representation of the embodiment of the present invention;
Fig. 3 is the image and video coding method flow schematic diagram of the embodiment of the present invention;
Fig. 4 is the image and video coding system configuration schematic diagram of the embodiment of the present invention;
Fig. 5 is image and the video encoding/decoding method schematic flow sheet of the embodiment of the present invention;
Fig. 6 is image and the video decoding system structural representation of the embodiment of the present invention.
Embodiment
A kind of image that the present invention is proposed below in conjunction with the drawings and specific embodiments and video coding-decoding method and system are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the purpose of the aid illustration embodiment of the present invention lucidly.
Please refer to Fig. 1, it is image of the present invention and video coding-decoding method schematic flow sheet.As shown in Figure 1, a kind of image and video coding-decoding method comprise image and video coding method and image and video encoding/decoding method, wherein,
Described image and video coding method comprises:
S11: maximum and the minimum value of obtaining the pixel component value in original image or video;
Especially, when described original image or video were black and white image or black and white video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of one-component.
Especially, when described original image or video were coloured image or color video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of three components.
Especially, when the maximum of the pixel component value in obtaining original image and minimum value, described original image is added up; When the maximum of the pixel component value in obtaining original video and minimum value, the frame of video in described original video is added up.
In cataloged procedure, the image block in statistics original image or video or the maximum of the pixel component value of frame of video and the amount of calculation of minimum value are very little for encoder, thereby but can improve code efficiency.
S12: adopt the lossy compression method method described original image of compression or video to generate compressed file or code stream, a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Especially, the lossy compression method method of employing is JPEG, MPEG-4, compression method H.264.
S13: the pixel component value that generates coding side reconstructed image piece or coding side reconstruction video frame according to the coded data of each image block in described original image or video or frame of video;
S14: will be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame,
Described image and video encoding/decoding method comprise:
S15: maximum and the minimum value of obtaining the pixel component value in original image or video from compressed file or code stream;
S16: according to the pixel component value of described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
S17: will be set to described maximum greater than the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame, to be set to described minimum value as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame less than the decoding end reconstructed image piece of described minimum value or the pixel component value of decoding end reconstruction video frame, to remain unchanged as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame,
Especially, new image or new video can not be identical with original image and video in actual conditions, but a kind of image of the present invention and video coding-decoding method, by the span of restriction pixel component value in the step that generates reconstructed image, thus the quality of raising code efficiency and decoded image or video.Especially, if the new decoding end reconstructed image piece of the pixel component value of the new coding side reconstructed image piece of each image block or frame of video or coding side reconstruction video frame and each image block or frame of video or the pixel component value of decoding end reconstruction video frame be correspondent equal not, mistake occurs in presentation code and decode procedure, need recompile and decoding.
Please refer to Fig. 2, it is image of the present invention and video coding and decoding system structural representation.As shown in Figure 2, a kind of image and video coding and decoding system comprise image and video coding system 21 and image and video decoding system 22;
Described image and video coding system comprises:
The first acquisition module 23 is for maximum and the minimum value of the pixel component value of obtaining original image or video;
Especially, when described original image or video were black and white image or black and white video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of one-component;
Especially, when described original image or video were coloured image or color video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of three components.
Especially, when the maximum of the pixel component value in obtaining original image and minimum value, described original image is added up; When the maximum of the pixel component value in obtaining original video and minimum value, the frame of video in described original video is added up.
The first compression module 24 is used for adopting the lossy compression method method described original image of compression or video to generate compressed file or code stream, and a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Concrete, described damage compression method comprises JPEG, MPEG-4, compression method H.264.
Coding side reconstructed image piece or coding side reconstruction video frame module 25 are used for each image block or the coded data generation coding side reconstructed image piece of frame of video or the pixel component value of coding side reconstruction video frame according to described original image or video;
coding side reconstructed image piece or coding side reconstruction video frame correcting module 26, be used for and be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame,
Described image and video decoding system comprise:
The second acquisition module 27 is used for obtaining from compressed file or code stream maximum and the minimum value of the pixel component value original image or video;
Decoding end reconstructed image piece or decoding end reconstruction video frame module 28 are used for the pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
decoding end reconstructed image piece or decoding end reconstruction video frame correcting module 29, be used for and be set to described maximum greater than the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame, to be set to described minimum value as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame less than the decoding end reconstructed image piece of described minimum value or the pixel component value of decoding end reconstruction video frame, to remain unchanged as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame.
Please refer to Fig. 3, it is the image and video coding method flow schematic diagram of the embodiment of the present invention.As shown in Figure 3, a kind of image and video coding method comprises:
S31: maximum and the minimum value of obtaining the pixel component value in original image or video;
Especially, when described original image or video were black and white image or black and white video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of one-component;
Especially, when described original image or video were coloured image or color video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of three components.
Especially, when the maximum of the pixel component value in obtaining original image and minimum value, described original image is added up; When the maximum of the pixel component value in obtaining original video and minimum value, the frame of video in described original video is added up.
S32: adopt the lossy compression method method described original image of compression or frame of video to generate compressed file or code stream, a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Concrete, the lossy compression method method of described employing comprises JPEG, MPEG-4, compression method H.264.
S33: the pixel component value that generates coding side reconstructed image piece or coding side reconstruction video frame according to the coded data of each image block in described original image or video or frame of video;
S34: will be greater than the maximum value of the reconstructed image coding side blocks or reconstructed video frame encoding side pixel component value is set to the maximum value as the new reconstructed image coding side blocks or reconstructed video frame encoding side pixel component values will smaller than the minimum reconstructed image coding side blocks or reconstructed video frame encoding side pixel component value is set to the minimum value as the new reconstructed image coding side blocks or reconstructed video frame encoding side pixel component values will be greater than equal to the and less than or equal to the minimum value above the maximum reconstructed image coding side blocks or reconstructed video frame encoding side pixel component values remain unchanged as the new reconstructed image coding side blocks or reconstructed video frame encoding side pixel component values .
Please refer to Fig. 4, it is the image and video coding system configuration schematic diagram of the embodiment of the present invention.As shown in Figure 4, a kind of image and video coding system 21 comprises:
The first acquisition module 23 is for maximum and the minimum value of the pixel component value of obtaining original image or video;
Especially, when described original image or video were black and white image or black and white video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of one-component;
Especially, when described original image or video were coloured image or color video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of three components.
Especially, when the maximum of the pixel component value in obtaining original image and minimum value, described original image is added up; When the maximum of the pixel component value in obtaining original video and minimum value, the frame of video in described original video is added up.
The first compression module 24 is used for adopting the lossy compression method method described original image of compression or video to generate compressed file or code stream, and a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Coding side reconstructed image piece or coding side reconstruction video frame module 25 are used for each image block or the coded data generation coding side reconstructed image piece of frame of video or the pixel component value of coding side reconstruction video frame according to described original image or video;
coding side reconstructed image piece or coding side reconstruction video frame correcting module 26, be used for and be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame.
Please refer to Fig. 5, it is image and the video encoding/decoding method schematic flow sheet of the embodiment of the present invention.As shown in Figure 5, a kind of image and video encoding/decoding method are decoded to the described compressed file or the code stream that generate in the image and video coding method, comprising:
S51: maximum and the minimum value of obtaining the pixel component value in original image or video from compressed file or code stream;
S52: according to the pixel component value of described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
S53: will be greater than the maximum value of the reconstructed image block decoder or decoding side reconstructed video frame pixel component value is set to the maximum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component values will smaller than the minimum block decoder or decoding side reconstructed image reconstruction pixel component values of the video frame is set to the minimum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component values will be greater than equal to the and less than or equal to the minimum value above the maximum reconstructed image block decoder or decoding side reconstructed video frame pixel component values remain unchanged as the new block decoder or decoding side reconstructed image reconstructed video frame pixel component values .
Please refer to Fig. 6, it is image and the video decoding system structural representation of the embodiment of the present invention.As shown in Figure 6, a kind of image and video decoding system 22 comprise:
The second acquisition module 27 is used for obtaining from compressed file or code stream maximum and the minimum value of the pixel component value original image or video;
Decoding end reconstructed image piece or decoding end reconstruction video frame module 28 are used for the pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
decoding end reconstructed image piece or decoding end reconstruction video frame correcting module 29, be used for and be set to described maximum greater than the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame, to be set to described minimum value as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame less than the decoding end reconstructed image piece of described minimum value or the pixel component value of decoding end reconstruction video frame, to remain unchanged as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame.
By the combination of said structure, the present invention does not increase in the situation of decoding operand at slight image and the frame of video coding operand of increasing, and has improved the quality of code efficiency and decoded image and frame of video.
Foregoing description is only the description to preferred embodiment of the present invention, is not any restriction to the scope of the invention, and any change, modification that the those of ordinary skill in field of the present invention is done according to above-mentioned disclosure all belong to the protection range of claims.
Claims (10)
1. an image and video coding-decoding method, is characterized in that, comprising: image and video coding method and image and video encoding/decoding method, wherein,
Described image and video coding method comprises:
Obtain maximum and the minimum value of the pixel component value in original image or video;
Adopt the lossy compression method method described original image of compression or video to generate compressed file or code stream, a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Generate the pixel component value of coding side reconstructed image piece or coding side reconstruction video frame according to the coded data of each image block in described original image or video or frame of video;
to be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame,
Described image and video encoding/decoding method comprise:
Obtain maximum and the minimum value of the pixel component value in original image or video from compressed file or code stream;
Pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
Will be greater than the maximum value of the reconstructed image block decoder or decoding side reconstructed video frame pixel component value is set to the maximum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component value will be less than the above the minimum block decoder or decoding side reconstructed image reconstructed video frame pixel component value is set to the minimum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component values greater than or equal to the minimum value and less than or equal to the maximum value of the reconstructed image block decoder or decoding side reconstructed video frame pixel component values remain unchanged as the new block decoder or decoding side reconstructed image reconstructed video frame pixel component values .
2. image according to claim 1 and video coding-decoding method, is characterized in that,
When described original image or video were black and white image or black and white video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of one-component;
When described original image or video were coloured image or color video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of three components.
3. image according to claim 1 and video coding-decoding method, it is characterized in that, in the maximum of the pixel component value in obtaining original image or video and the step of minimum value, when the maximum of the pixel component value in obtaining original image and minimum value, described original image is added up; When the maximum of the pixel component value in obtaining original video and minimum value, the frame of video in described original video is added up.
4. an image and video coding method, is characterized in that, comprising:
Obtain maximum and the minimum value of the pixel component value in original image or video;
Adopt the lossy compression method method described original image of compression or frame of video to generate compressed file or code stream, a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Generate the pixel component value of coding side reconstructed image piece or coding side reconstruction video frame according to the coded data of each image block in described original image or video or frame of video;
Will be greater than the maximum value of the reconstructed image coding side terminal block or coded video frame reconstructed pixel component value is set to the maximum value as the new reconstructed image coding side terminal blocks or reconstructed video frame coded pixel component value will be less than the above the minimum coding side reconstructed image blocks or reconstructed video frame encoding side pixel component value is set to the minimum value as the new reconstructed image coding side blocks or reconstructed video frame encoding side pixel component values greater than or equal to the minimum value and less than or equal to the maximum value of the reconstructed image coding side terminal block or coded video frame reconstructed pixel component values remain unchanged as the new reconstructed image coding side terminal blocks or reconstructed video frame coded pixel component values .
5. an image and video encoding/decoding method, is characterized in that, the described compressed file or the code stream that generate in image and video coding method as claimed in claim 4 are decoded, and comprising:
Obtain maximum and the minimum value of the pixel component value in original image or video from compressed file or code stream;
Pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
Will be greater than the maximum value of the reconstructed image block decoder or decoding side reconstructed video frame pixel component value is set to the maximum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component value will be less than the above the minimum block decoder or decoding side reconstructed image reconstructed video frame pixel component value is set to the minimum value as the new reconstructed image block decoder or decoding side reconstructed video frame pixel component values greater than or equal to the minimum value and less than or equal to the maximum value of the reconstructed image block decoder or decoding side reconstructed video frame pixel component values remain unchanged as the new block decoder or decoding side reconstructed image reconstructed video frame pixel component values .
6. an image and video coding and decoding system, is characterized in that, comprising: image and video coding system and image and video decoding system, wherein,
Described image and video coding system comprises:
The first acquisition module is for maximum and the minimum value of the pixel component value of obtaining original image or video;
The first compression module is used for adopting the lossy compression method method described original image of compression or video to generate compressed file or code stream, and a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Coding side reconstructed image piece or coding side reconstruction video frame module are used for each image block or the coded data generation coding side reconstructed image piece of frame of video or the pixel component value of coding side reconstruction video frame according to described original image or video;
coding side reconstructed image piece or coding side reconstruction video frame correcting module, be used for and be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame,
Described image and video decoding system comprise:
The second acquisition module is used for obtaining from compressed file or code stream maximum and the minimum value of the pixel component value original image or video;
Decoding end reconstructed image piece or decoding end reconstruction video frame module are used for the pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
decoding end reconstructed image piece or decoding end reconstruction video frame correcting module, be used for and be set to described maximum greater than the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame, to be set to described minimum value as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame less than the decoding end reconstructed image piece of described minimum value or the pixel component value of decoding end reconstruction video frame, to remain unchanged as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame.
7. image according to claim 6 and video coding and decoding system, is characterized in that,
When described original image or video were black and white image or black and white video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of one-component;
When described original image or video were coloured image or color video, the maximum of described pixel component value and minimum value comprised maximum and the minimum value of three components.
8. image according to claim 6 and video coding and decoding system, it is characterized in that, in the maximum of the pixel component value in obtaining original image or video and the step of minimum value, when the maximum of the pixel component value in obtaining original image and minimum value, described original image is added up; When the maximum of the pixel component value in obtaining original video and minimum value, the frame of video in described original video is added up.
9. an image and video coding system, is characterized in that, comprising:
The first acquisition module is for maximum and the minimum value of the pixel component value of obtaining original image or video;
The first compression module is used for adopting the lossy compression method method described original image of compression or video to generate compressed file or code stream, and a part of coded data of described compressed file or code stream comprises described maximum and minimum value;
Coding side reconstructed image piece or coding side reconstruction video frame module are used for each image block or the coded data generation coding side reconstructed image piece of frame of video or the pixel component value of coding side reconstruction video frame according to original image or video;
coding side reconstructed image piece or coding side reconstruction video frame correcting module, be used for and be set to described maximum greater than the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame, to be set to described minimum value as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame less than the coding side reconstructed image piece of described minimum value or the pixel component value of coding side reconstruction video frame, to remain unchanged as the pixel component value of new coding side reconstructed image piece or coding side reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked coding side reconstructed image piece or coding side reconstruction video frame.
10. an image and video decoding system, is characterized in that, comprising:
The second acquisition module is used for obtaining from compressed file or code stream maximum and the minimum value of the pixel component value original image or video;
Decoding end reconstructed image piece or decoding end reconstruction video frame module are used for the pixel component value according to described compressed file or code stream generation decoding end reconstructed image piece or decoding end reconstruction video frame;
decoding end reconstructed image piece or decoding end reconstruction video frame correcting module, be used for and be set to described maximum greater than the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame, to be set to described minimum value as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame less than the decoding end reconstructed image piece of described minimum value or the pixel component value of decoding end reconstruction video frame, to remain unchanged as the pixel component value of new decoding end reconstructed image piece or decoding end reconstruction video frame more than or equal to described minimum value and less than or equal to the pixel component value of described peaked decoding end reconstructed image piece or decoding end reconstruction video frame.
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