CN104320663A - Video compression method and device and video transmission system - Google Patents
Video compression method and device and video transmission system Download PDFInfo
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Abstract
The invention provides a video compression method and device and a video transmission system. According to the video compression method, a first video signal meeting a preset video format requirement is generated by responding to a received video signal; frame images instructed by image information of each frame in the first video signal are divided into a plurality of subimage blocks carrying image information according to a preset division rule; a compression rule corresponding to each subimage block is determined; then, the image information carried by each subimage block is compressed by utilizing the corresponding compression rule of each subimage block, accordingly, the compression process on the video signal is achieved, and the requirements of the video signal for bandwidth are reduced.
Description
Technical field
The application relates to technical field of video compression, particularly relates to a kind of video-frequency compression method and device and Video transmission system.
Background technology
Possum: be a kind of self-service equipment being combined with multiple different financial business function, the function that holder can utilize this equipment to provide completes inquiry, change password, deposits, the financial service such as to withdraw the money.
VTC: control system, for driving the software of Possum, realizes that remote audio-video between client and long-range customer service is mutual, Center Technology platform that remote assistance, document memory scan, business handling provide.
VTA: long-range customer service system, for the software driving long-range customer service to attend a banquet, realizes the information interaction of carrying out video, audio frequency with client.
In existing banking system, often to be held at VTC by client and initiate transaction, long-range customer service is held long-distance video functional realiey and client's dialogue by VTA and is assisted client to complete transaction.Because hair fastener, signing transaction all need long-range customer service whole process to get involved guiding, therefore network Video transmission system technology is particularly important.
Because Video transmission system must utilize Internet resources, and be subject to the restriction (current bank special line wide area network bandwidth only has 2M) of Wide Area Network bandwidth, the bandwidth leaving transmission of video for is very little, in order to meet the requirement of client and long-range customer service real-time deal, the smooth complete transmission of video under limited bandwidth, maximum compression must be done, to reduce the requirement to bandwidth when not losing or lose less to vision signal.
Summary of the invention
In view of this, the application provides a kind of video-frequency compression method and device and Video transmission system, to realize compression to vision signal, to reduce vision signal to the requirement of bandwidth.
To achieve these goals, the technical scheme that provides of the embodiment of the present invention is as follows:
A kind of video-frequency compression method, comprising:
Respond the vision signal received, generate the first vision signal meeting and preset video format requirements;
For each frame image information in described first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information;
Determine reduced rule corresponding with each described subimage block respectively;
The reduced rule corresponding with it is utilized to compress the image information that this subimage block carries for each described subimage block.
Preferably, the vision signal that described response receives, generating the process meeting the first vision signal presetting video format requirements is:
Responding the vision signal received, is YCbCr chrominance space by the color space convert of this vision signal;
The vision signal of carrying out after color space convert is carried out colourity sampling and interlacing scan, generates the first vision signal meeting and preset video format requirements.
Preferably, determine that the process of the reduced rule corresponding with described subimage block is:
Calculate the motion vector of this subimage block;
Judge whether described motion vector exceedes predetermined movement vector reference value;
When being, determine that the reduced rule corresponding with this subimage block is the first reduced rule;
When no, determine that the reduced rule corresponding with this subimage block is the second reduced rule.
Preferably, when the motion vector of described subimage block does not exceed predetermined movement vector reference value, the method also comprises:
Calculate the marginal information value of this subimage block;
Judge whether this marginal information value exceedes default marginal information reference value;
When being, determine that the reduced rule corresponding with this subimage block is the 3rd reduced rule;
When no, determine that the reduced rule corresponding with this subimage block is the 4th reduced rule.
Preferably, described reduced rule is: compress the image information that subimage block carries according to the weight information carried in this reduced rule.
A kind of video compression device, comprising:
First Video signal generation unit, for responding the vision signal received, generates the first vision signal meeting and preset video format requirements;
Subimage block division unit, for for each frame image information in described first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information;
Reduced rule determining unit, for determining reduced rule corresponding with each described subimage block respectively;
Compression unit, for utilizing the reduced rule corresponding with it to compress the image information that this subimage block carries for each described subimage block.
Preferably, described first Video signal generation unit, comprising:
The color space convert of this vision signal, for responding the vision signal received, is YCbCr chrominance space by color space convert unit;
First vision signal generates subelement, carries out colourity sampling and interlacing scan for the vision signal of will carry out after color space convert, generates the first vision signal meeting and preset video format requirements.
Preferably, described reduced rule determining unit, comprising:
Motion vector computation unit, for calculating the motion vector of this subimage block;
Motion vector judging unit, for judging whether described motion vector exceedes predetermined movement vector reference value;
First reduced rule determination subelement, during for exceeding predetermined movement vector reference value when described motion vector, determines that the reduced rule corresponding with this subimage block is the first reduced rule; When described motion vector does not exceed predetermined movement vector reference value, determine that the reduced rule corresponding with this subimage block is the second reduced rule.
Preferably, described reduced rule determining unit, also comprises:
Marginal information value computing unit, during for not exceeding predetermined movement vector reference value when the motion vector of described subimage block, calculates the marginal information value of this subimage block;
Marginal information value judging unit, for judging whether this marginal information value exceedes default marginal information reference value;
Second reduced rule determination subelement, for when described marginal information value exceedes default marginal information reference value, determines that the reduced rule corresponding with this subimage block is the 3rd reduced rule; When described marginal information value does not exceed default marginal information reference value, determine that the reduced rule corresponding with this subimage block is the 4th reduced rule.
A kind of Video transmission system, comprising: video signal collective device, video signal compression device and video signal receiver, wherein:
Described video signal compression device responds the vision signal of the video signal collective device transmission received, and generates the first vision signal meeting and preset video format requirements; And for each frame image information in described first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information; And, determine reduced rule corresponding with each described subimage block respectively; And, utilize the reduced rule corresponding with it to compress the image information that this subimage block carries for each described subimage block; And, the vision signal after compression is sent to described video signal receiver.
The application provides a kind of video-frequency compression method and device and Video transmission system, by responding the vision signal received, generates the first vision signal meeting and preset video format requirements; For each frame image information in the first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information; And determine reduced rule corresponding with each subimage block respectively; And then utilize the reduced rule corresponding with it to compress the image information that this subimage block carries for each subimage block, to realize compression process to vision signal, minimizing vision signal to the requirement of bandwidth.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
A kind of video-frequency compression method flow chart that Fig. 1 provides for the embodiment of the present application one;
A kind of method flow diagram determining the reduced rule corresponding with subimage block that Fig. 2 provides for the embodiment of the present application one;
Fig. 3 determines the method flow diagram of the reduced rule corresponding with subimage block for another kind that the embodiment of the present application one provides;
The structural representation of a kind of video compression device that Fig. 4 provides for the embodiment of the present application two;
The structural representation of a kind of video compression system that Fig. 5 provides for the embodiment of the present application three.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one:
A kind of video-frequency compression method flow chart that Fig. 1 provides for the embodiment of the present application one.
As shown in Figure 1, the method comprises:
The vision signal that S101, response receive, generates the first vision signal meeting and preset video format requirements;
Concrete, in the embodiment of the present application, be previously provided with video format, after receiving vision signal, this vision signal need be converted to the first vision signal of the requirement meeting this video format so that reprocessing.
S102, for each frame image information in the first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information;
Concrete, in the embodiment of the present application, this division rule is the subimage block two field picture that frame image information indicates being divided into 8*8, and frame image information comprises multiple image information, carries the image information corresponding with it in each subimage block.
Below be only the optimal way of the embodiment of the present application, inventor can arrange this division rule according to the demand of oneself, and the two field picture as indicated by frame image information is divided into the subimage block etc. of 16*16, does not limit at this.
S103, determine reduced rule corresponding with each subimage block respectively;
S104, the reduced rule corresponding with it is utilized to compress the image information that this subimage block carries for each subimage block.
The application provides a kind of video-frequency compression method, by responding the vision signal received, generates the first vision signal meeting and preset video format requirements; For each frame image information in the first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information; And determine reduced rule corresponding with each subimage block respectively; And then utilize the reduced rule corresponding with it to compress the image information that this subimage block carries for each subimage block, to realize compression process to vision signal, minimizing vision signal to the requirement of bandwidth.
Concrete, in a kind of video-frequency compression method that the embodiment of the present application provides, respond the vision signal received, generating the process meeting the first vision signal presetting video format requirements is:
Responding the vision signal received, is YCbCr chrominance space by the color space convert of this vision signal; The vision signal of carrying out after color space convert is carried out colourity sampling and interlacing scan, generates the first vision signal meeting and preset video format requirements.
Concrete, the vision signal received is pretreated vision signal preferably, as: by the digital video signal of the first-class analog video signal collected after conversion of making a video recording, the vision signal obtained after this digital video signal being carried out preliminary treatment (preliminary treatment comprises: the technology such as gamma correction, image interpolation, image rectification, white balance, image enhaucament and gain control).
Concrete, be previously provided with call format, this preset format requires the vision signal for 4:2:0 form.
Below be only the optimal way of the embodiment of the present application, inventor can arrange arbitrarily this preset format requirement according to the demand of oneself, as being set to the vision signal of 4:2:2 form, does not limit at this.
The vision signal of the application by receiving response, generate the concrete introduction of process meeting the first vision signal presetting video format requirements, a kind of video-frequency compression method that the embodiment of the present application is provided is more clear, be convenient to those skilled in the art and understand.But those skilled in the art it should be appreciated that the process that generation that the embodiment of the present application provides meets the first vision signal of default video format requirements is not limited to this, and inventor can set arbitrarily according to the demand of oneself.
Concrete, as shown in Figure 2, be a kind of method flow diagram determining the reduced rule corresponding with subimage block that the embodiment of the present application one provides.
As shown in Figure 2, the method comprises:
S201, calculate the motion vector of this subimage block;
Concrete, all carry the multiple image informations corresponding with it in each subimage block, the multiple image informations utilizing this subimage block to carry can calculate its motion vector.
S202, judge whether motion vector exceedes predetermined movement vector reference value;
Concrete, the motion vectors reference value that this predetermined movement vector reference value can preset according to the experience of oneself for inventor; The motion vector computation that may also be each subimage block in two field picture belonging to this subimage block forms, as: using the mean value of the motion vector of each subgraph in two field picture belonging to current subimage block as predetermined movement vector reference value.
Below be only the optimal way of the embodiment of the present application, inventor can set arbitrarily the obtain manner of motion vectors reference value according to the demand of oneself, do not limit at this.
Concrete, the motion vector of the subimage block calculated comprises the direction of motion and represents motion vector numerical value two parts of motion size, in the embodiment of the present application, preferably, motion vector numerical value and predetermined movement vector reference value are compared, judges whether it exceedes the numerical value of motion vectors reference value.
Below be only the optimal way of the embodiment of the present application, inventor can arrange arbitrarily according to the demand of oneself and judge whether motion vector exceedes the concrete mode of predetermined movement vector reference value, as: except motion vector numerical value and predetermined movement vector reference value are compared, judge beyond its numerical value whether exceeding motion vectors reference value, also the direction of motion of the direction of motion and predetermined movement vector reference value is compared, judge that whether the direction of motion is equal mutually, do not limit at this.
S203, determine that the reduced rule corresponding with this subimage block is the first reduced rule;
Concrete, when motion vector exceedes predetermined movement vector reference value, determine that the reduced rule corresponding with this subimage block is the first reduced rule.
Concrete, in a kind of video-frequency compression method that the embodiment of the present application provides, reduced rule is: compress the image information that subimage block carries according to the weight information carried in this reduced rule.
As: the weight information carried in the first reduced rule is set to 1, namely represents and the image information that this subimage block carries is not compressed; Or, the weight information carried in first reduced rule is set to 0.9, then represent that the mode of the image information by remaining 90% in image information that this subimage block carries is compressed the image information that this subimage block carries, and which image information of concrete residue is by the setting of this first reduced rule, does not limit at this.
Below be only the optimal way of the embodiment of the present application, inventor can arrange arbitrarily the particular content of the first reduced rule according to the demand of oneself, do not limit at this.
S204, determine that the reduced rule corresponding with this subimage block is the second reduced rule.
Concrete, when motion vector does not exceed predetermined movement vector reference value, determine that the reduced rule corresponding with this subimage block is the second reduced rule.
The application is by the description of process determining the reduced rule corresponding with subimage block, and a kind of video-frequency compression method that the embodiment of the present application is provided is more clear, be convenient to those skilled in the art understands.But those skilled in the art it should be appreciated that the process of the reduced rule that determination that the embodiment of the present application provides is corresponding with subimage block is not limited to this, and inventor can set arbitrarily according to the demand of oneself.
Further, as shown in Figure 3, the another kind provided for the embodiment of the present application one determines the method flow diagram of the reduced rule corresponding with subimage block.
As shown in Figure 3, the basis of the method for the reduced rule that the determination that provides at above-mentioned Fig. 2 of the method is corresponding with subimage block comprises further:
S301, calculate the marginal information value of this subimage block;
Concrete, when the motion vector judging to obtain subimage block does not exceed predetermined movement vector reference value, calculate the marginal information value of this subimage block.
S302, judge whether this marginal information value exceedes default marginal information reference value;
S303, determine that the reduced rule corresponding with this subimage block is the 3rd reduced rule;
Concrete, when judging that obtaining marginal information value exceedes default marginal information reference value, determine that the reduced rule corresponding with this subimage block is the 3rd reduced rule.
S304, determine that the reduced rule corresponding with this subimage block is the 4th reduced rule.
Concrete, when judging that obtaining marginal information value does not exceed default marginal information reference value, determine that the reduced rule corresponding with this subimage block is the 4th reduced rule.
Concrete, in a kind of video-frequency compression method that the embodiment of the present application provides, after utilizing the first reduced rule, the second reduced rule, the 3rd reduced rule or the 4th reduced rule to compress the image information that same subimage block carries, preferably, the data volume of remaining video information order is from big to small followed successively by the first reduced rule, the second reduced rule, the 3rd reduced rule, the 4th reduced rule.
The application is by the further describing of process determining the reduced rule corresponding with subimage block, and a kind of video-frequency compression method that the embodiment of the present application is provided is more clear, be convenient to those skilled in the art understands.But those skilled in the art it should be appreciated that the process of the reduced rule that determination that the embodiment of the present application provides is corresponding with subimage block is not limited to this, and inventor can set arbitrarily according to the demand of oneself.
Embodiment two:
The structural representation of a kind of video compression device that Fig. 4 provides for the embodiment of the present application two.
As shown in Figure 4, this device comprises:
First Video signal generation unit 11, for responding the vision signal received, generates the first vision signal meeting and preset video format requirements;
Concrete, the first Video signal generation unit, comprising: color space convert unit, for responding the vision signal received, is YCbCr chrominance space by the color space convert of this vision signal; First vision signal generates subelement, carries out colourity sampling and interlacing scan for the vision signal of will carry out after color space convert, generates the first vision signal meeting and preset video format requirements.
Subimage block division unit 12, for for each frame image information in the first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information;
Reduced rule determining unit 13, for determining reduced rule corresponding with each subimage block respectively;
Concrete, reduced rule determining unit, comprising: motion vector computation unit, for calculating the motion vector of this subimage block; Motion vector judging unit, for judging whether motion vector exceedes predetermined movement vector reference value; First reduced rule determination subelement, during for exceeding predetermined movement vector reference value when motion vector, determines that the reduced rule corresponding with this subimage block is the first reduced rule; When motion vector does not exceed predetermined movement vector reference value, determine that the reduced rule corresponding with this subimage block is the second reduced rule.
Further, this reduced rule determining unit, also comprises: marginal information value computing unit, during for not exceeding predetermined movement vector reference value when the motion vector of subimage block, calculates the marginal information value of this subimage block; Marginal information value judging unit, for judging whether this marginal information value exceedes default marginal information reference value; Second reduced rule determination subelement, for when marginal information value exceedes default marginal information reference value, determines that the reduced rule corresponding with this subimage block is the 3rd reduced rule; When marginal information value does not exceed default marginal information reference value, determine that the reduced rule corresponding with this subimage block is the 4th reduced rule.
Compression unit 14, for utilizing the reduced rule corresponding with it to compress the image information that this subimage block carries for each subimage block.
The application provides a kind of video compression device, by responding the vision signal received, generates the first vision signal meeting and preset video format requirements; For each frame image information in the first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information; And determine reduced rule corresponding with each subimage block respectively; And then utilize the reduced rule corresponding with it to compress the image information that this subimage block carries for each subimage block, to realize compression process to vision signal, minimizing vision signal to the requirement of bandwidth.
Embodiment three:
The structural representation of a kind of video compression system that Fig. 5 provides for the embodiment of the present application three.
As shown in Figure 5, this system comprises: video signal collective device 21, video signal compression device 22 and video signal receiver 23, wherein:
Video signal compression device responds the vision signal of the video signal collective device transmission received, and generates the first vision signal meeting and preset video format requirements; And for each frame image information in the first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information; And, determine reduced rule corresponding with each subimage block respectively; And, utilize the reduced rule corresponding with it to compress the image information that this subimage block carries for each subimage block; And, the vision signal after compression is sent to video signal receiver.
Concrete, the video signal collective device in the video compression system that the embodiment of the present application provides lays respectively at VTC end and VTA end, and in like manner video signal receiver also lays respectively at VTC end and VTA end.
Concrete, the video decompression method corresponding with the video-frequency compression method that the embodiment of the present application provides, for the inverse process of the video-frequency compression method that the embodiment of the present application provides, mainly the carrying out that wherein can not be always completely recovered image information is quantized, make its recovery close as far as possible, detailed process does not repeat them here.
The application provides a kind of video compression system, comprise: video signal collective device, video signal compression device and video signal receiver, wherein: video signal compression device responds the vision signal of the video signal collective device transmission received, and generates the first vision signal meeting and preset video format requirements; And for each frame image information in the first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information; And, determine reduced rule corresponding with each subimage block respectively; And, utilize the reduced rule corresponding with it to compress the image information that this subimage block carries for each subimage block; And, by compression after vision signal be sent to video signal receiver, with realize to compression after vision signal transmission, reduce vision signal to the requirement of bandwidth.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Below be only the preferred implementation of the application, those skilled in the art understood or realizes the application.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a video-frequency compression method, is characterized in that, comprising:
Respond the vision signal received, generate the first vision signal meeting and preset video format requirements;
For each frame image information in described first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information;
Determine reduced rule corresponding with each described subimage block respectively;
The reduced rule corresponding with it is utilized to compress the image information that this subimage block carries for each described subimage block.
2. method according to claim 1, is characterized in that, the vision signal that described response receives, and generates the process meeting the first vision signal presetting video format requirements to be:
Responding the vision signal received, is YCbCr chrominance space by the color space convert of this vision signal;
The vision signal of carrying out after color space convert is carried out colourity sampling and interlacing scan, generates the first vision signal meeting and preset video format requirements.
3. method according to claim 1, is characterized in that, determines that the process of the reduced rule corresponding with described subimage block is:
Calculate the motion vector of this subimage block;
Judge whether described motion vector exceedes predetermined movement vector reference value;
When being, determine that the reduced rule corresponding with this subimage block is the first reduced rule;
When no, determine that the reduced rule corresponding with this subimage block is the second reduced rule.
4. method according to claim 3, is characterized in that, when the motion vector of described subimage block does not exceed predetermined movement vector reference value, the method also comprises:
Calculate the marginal information value of this subimage block;
Judge whether this marginal information value exceedes default marginal information reference value;
When being, determine that the reduced rule corresponding with this subimage block is the 3rd reduced rule;
When no, determine that the reduced rule corresponding with this subimage block is the 4th reduced rule.
5. the method according to claim 1-4 any one, is characterized in that, described reduced rule is: compress the image information that subimage block carries according to the weight information carried in this reduced rule.
6. a video compression device, is characterized in that, comprising:
First Video signal generation unit, for responding the vision signal received, generates the first vision signal meeting and preset video format requirements;
Subimage block division unit, for for each frame image information in described first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information;
Reduced rule determining unit, for determining reduced rule corresponding with each described subimage block respectively;
Compression unit, for utilizing the reduced rule corresponding with it to compress the image information that this subimage block carries for each described subimage block.
7. device according to claim 6, is characterized in that, described first Video signal generation unit, comprising:
The color space convert of this vision signal, for responding the vision signal received, is YCbCr chrominance space by color space convert unit;
First vision signal generates subelement, carries out colourity sampling and interlacing scan for the vision signal of will carry out after color space convert, generates the first vision signal meeting and preset video format requirements.
8. device according to claim 6, is characterized in that, described reduced rule determining unit, comprising:
Motion vector computation unit, for calculating the motion vector of this subimage block;
Motion vector judging unit, for judging whether described motion vector exceedes predetermined movement vector reference value;
First reduced rule determination subelement, during for exceeding predetermined movement vector reference value when described motion vector, determines that the reduced rule corresponding with this subimage block is the first reduced rule; When described motion vector does not exceed predetermined movement vector reference value, determine that the reduced rule corresponding with this subimage block is the second reduced rule.
9. device according to claim 8, is characterized in that, described reduced rule determining unit, also comprises:
Marginal information value computing unit, during for not exceeding predetermined movement vector reference value when the motion vector of described subimage block, calculates the marginal information value of this subimage block;
Marginal information value judging unit, for judging whether this marginal information value exceedes default marginal information reference value;
Second reduced rule determination subelement, for when described marginal information value exceedes default marginal information reference value, determines that the reduced rule corresponding with this subimage block is the 3rd reduced rule; When described marginal information value does not exceed default marginal information reference value, determine that the reduced rule corresponding with this subimage block is the 4th reduced rule.
10. a Video transmission system, is characterized in that, comprising: video signal collective device, video signal compression device and video signal receiver, wherein:
Described video signal compression device responds the vision signal of the video signal collective device transmission received, and generates the first vision signal meeting and preset video format requirements; And for each frame image information in described first vision signal, the two field picture indicated according to default division rule is divided into multiple subimage block carrying image information; And, determine reduced rule corresponding with each described subimage block respectively; And, utilize the reduced rule corresponding with it to compress the image information that this subimage block carries for each described subimage block; And, the vision signal after compression is sent to described video signal receiver.
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Application publication date: 20150128 |