CN102377730A - Audio/video signal processing method and mobile terminal - Google Patents
Audio/video signal processing method and mobile terminal Download PDFInfo
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- CN102377730A CN102377730A CN2010102507474A CN201010250747A CN102377730A CN 102377730 A CN102377730 A CN 102377730A CN 2010102507474 A CN2010102507474 A CN 2010102507474A CN 201010250747 A CN201010250747 A CN 201010250747A CN 102377730 A CN102377730 A CN 102377730A
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Abstract
The invention discloses an audio/video signal processing method and a mobile terminal. The method comprises the following steps: acquiring a motion state of a mobile terminal; dynamically adjusting parameters of a preset strategy according to the motion state of the mobile terminal; and encoding and transmitting an audio/video signal acquired by the mobile terminal by using the adjusted parameters of the preset strategy. In the invention, the acquired audio/video signal is encoded and transmitted on the basis of the motion state of the mobile terminal and the preset strategy, thereby satisfying the demands of various users by using different strategies under the conditions of limited mobile terminal processing capacity or limited uplink network bandwidth.
Description
Technical field
The present invention relates to moving communicating field, more specifically, relate to a kind of processing method and portable terminal of audio-video signal.
Background technology
The development of mobile communication makes mobile terminal devices such as mobile phone become more and more universal.Simultaneously; The function of mobile phone has also expanded to many aspects such as multimedia from simple phonetic function; Wherein, Can satisfy the user with retransmission technique and carry out the demand that immediate interactive is shared with scene based on the audio frequency and video of mobile phone are live, have bigger advantage aspect the user experiences such as Real-Time Sharing than other means.
But, since at present mobile terminal device such as mobile phone aspect disposal ability and uplink network bandwidth aspect all have bigger restriction, so cause the quality of the audio-video signal of uploading to be difficult to satisfy user's demand.
Summary of the invention
The technical problem that the present invention will solve provides a kind of processing method of audio-video signal, can satisfy the diversified demand of all types of user according to Different Strategies.
The invention provides a kind of processing method of audio-video signal, comprise the motion state of obtaining portable terminal; Dynamically adjust the parameter of preset strategy according to the motion state of portable terminal; The audio-video signal that utilizes the parameter of adjusted preset strategy that portable terminal is collected is encoded and transmission process.
According to an embodiment of the inventive method, obtain the motion state of portable terminal through following manner: utilize the data of the acceleration of gravity sensor acquisition be built in portable terminal to confirm the motion state of portable terminal; Or utilize a plurality of frame of video signals that collect to compare, to confirm the motion state of portable terminal; Or the vision signal that collects through the judgement motion state of clear definite portable terminal whether.
According to another embodiment of the inventive method, preset strategy is image definition preference strategy, Video Continuous property preference strategy or audio signal preference strategy.
According to the another embodiment of the inventive method, the image definition preference strategy comprises at least a in the resolution that improves coded image and the frame per second that reduces video coding.
According to an embodiment again of the inventive method, Video Continuous property preference strategy comprises at least a in the resolution that reduces coded image and the frame per second that improves video coding.
According to an embodiment again of the inventive method, the audio signal preference strategy comprises at least a in transmission static coded image and the transmitting audio signal.
Embodiment again according to the inventive method; The step of dynamically adjusting the parameter of preset strategy according to the motion state of portable terminal comprises: dynamically adjust the resolution of coded image or the frame per second of video coding according to the motion state of portable terminal, or transmission signals selectively.
According to an embodiment again of the inventive method, this method also comprises: the audio-video signal to collecting carries out format conversion.
Audio-video signal processing method of the present invention; Based on the motion state of portable terminal and predetermined strategy the coding and the transmission of the audio-video signal that collects are controlled; Under or uplink network band-limited situation limited in the portable terminal disposal ability, the enough different strategies of ability satisfy the demand of all types of user.
Another technical problem that the present invention will solve provides a kind of portable terminal, can satisfy the diversified demand of all types of user according to Different Strategies.
The present invention also provides a kind of portable terminal, comprises SOT state of termination sensing module, is used to obtain the motion state of portable terminal; Control module links to each other with SOT state of termination sensing module, is used for dynamically adjusting according to the motion state of portable terminal the parameter of preset strategy; Processing module links to each other with control module, is used to utilize the parameter of adjusted preset strategy that the audio-video signal that collects is encoded and transmission process.
The terminal embodiment according to the present invention, preset strategy is image definition preference strategy, Video Continuous property preference strategy or audio signal preference strategy.
Another embodiment at terminal according to the present invention, image definition preference strategy comprise at least a in the resolution that improves coded image and the frame per second that reduces video coding.
The another embodiment at terminal according to the present invention, Video Continuous property preference strategy comprise at least a in the resolution that reduces coded image and the frame per second that improves video coding.
The embodiment again at terminal according to the present invention, audio signal preference strategy comprise at least a in transmission static coded image and the transmitting audio signal.
The embodiment again at terminal according to the present invention, the terminal also comprises: the audio-video collection module is used for gathering in real time audio-video signal; Format converting module links to each other with audio-video collection module and processing module, is used for the audio-video signal that collects is carried out format conversion.
Portable terminal of the present invention; Based on the motion state of portable terminal and predetermined strategy the coding and the transmission of the audio-video signal that collects are controlled; Under or uplink network band-limited situation limited in the portable terminal disposal ability, the enough different strategies of ability satisfy the demand of all types of user.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of first embodiment of the inventive method.
Fig. 2 is the schematic flow sheet of the 4th embodiment of the inventive method.
Fig. 3 is the structural representation of first embodiment of portable terminal of the present invention.
Fig. 4 is the structural representation of second embodiment of portable terminal of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is more comprehensively described, exemplary embodiment of the present invention wherein is described.Exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, but do not constitute improper qualification of the present invention.
Fig. 1 is the schematic flow sheet of first embodiment of the inventive method.
As shown in Figure 1, this embodiment can may further comprise the steps:
S102; Obtain the motion state of portable terminal, for example, can pass through the data of analyte sensors collection or the motion state of the frame of video perception portable terminal that the audio and video acquisition devices on the analysis portable terminal is gathered; Wherein, motion state can comprise static, microinching and rapid movement;
S104 dynamically adjusts the parameter of preset strategy according to the motion state of portable terminal, for example, according in the motion state adjustment strategy of portable terminal such as the coding parameters such as frame per second of coded image resolution or video coding;
S106, the audio-video signal that utilizes the parameter of adjusted preset strategy that portable terminal is collected is encoded and transmission process.
This embodiment controls the coding and the transmission of the audio-video signal that collects based on the motion state of portable terminal and predetermined strategy; Under or uplink network band-limited situation limited, can utilize different strategies to satisfy requirements of different users in the portable terminal disposal ability.
In second embodiment of the inventive method, can obtain the motion state of portable terminal in the following manner:
When the position of portable terminal and speed change; The acceleration of gravity transducer that is built in portable terminal can perceive motion; Can confirm from the information that the acceleration of gravity transducer obtains whether the motion state of portable terminal changes, thereby can utilize the data of the acceleration of gravity sensor acquisition that is built in portable terminal to confirm the motion state of portable terminal; Or
A plurality of frame of video signals that utilization collects are compared, and to confirm the motion state of portable terminal, for example, when mobile phone moved, there was displacement in same object in the consecutive frame, thereby can confirm the motion state of portable terminal according to the displacement situation; Or
Whether the vision signal that collects through judgement the motion state of clear definite portable terminal, for example, can be relatively based on gray scale, some acutance method or edge sharpness method are judged.
This shows that this embodiment can obtain the motion state of portable terminal through multiple means.
In the above-described embodiments, preset strategy can be image definition preference strategy, Video Continuous property preference strategy or audio signal preference strategy.
Particularly, the image definition preference strategy comprises at least a in the resolution that improves coded image and the frame per second that reduces video coding.
Video Continuous property preference strategy comprises at least a in the resolution that reduces coded image and the frame per second that improves video coding.
The audio signal preference strategy comprises at least a in transmission static coded image and the transmitting audio signal.
In the 3rd embodiment of the inventive method; The step of dynamically adjusting the parameter of preset strategy according to the motion state of portable terminal comprises: dynamically adjust the resolution of coded image or the frame per second of video coding according to the motion state of portable terminal; Or transmission signals (for example a, transmitting audio signal) selectively.
Illustrate, if preset strategy is " image definition is preferential " strategy, and current parameter is CLV Common Intermediate Format (Common Intermediate Format; CIF), 15 frame/seconds (frame per second, fps), when perceiving motion of mobile terminals; Can obtain the moving direction and the speed of portable terminal from acceleration of gravity transducer (for example, the api interface that provides through transducer), when the acceleration of portable terminal surpasses certain threshold value; For example; 0.5G the time, can think that motion state of mobile terminal changes (that is rapid movement) more quickly; Drop to 5fps to guarantee the definition of image with original sampling frame per second (if camera does not support dynamically to change sampling frame per second, the frame per second of then will encoding) from 15fps this moment.
Again for example,, and perceive portable terminal,, can further reduce the resolution of the coded image in the preset strategy in order to guarantee the continuity of video better at rapid movement if preset strategy is " Video Continuous property is preferential " strategy.
This embodiment can dynamically adjust the parameter in the preset strategy according to the motion state of portable terminal, thereby can under the situation of resource-constrained, satisfy the demand of all types of user well.
Fig. 2 is the schematic flow sheet of the 4th embodiment of the inventive method.
As shown in Figure 2, this embodiment may further comprise the steps:
S202 gathers audio-video signal, and the audio-video signal that collects is carried out format conversion; For example; With the video RGB that collects (Red Green Blue, RGB) or lightness-colourity-concentration (Luminance-Chrominance-Chroma, YUV) waiting the source format conversion of signals is the signal of forms such as H263, H264; Convert audio signal into Advanced Audio Coding (AdvancedAudio Coding, AAC) signal of form such as grade;
S204 obtains the motion state of portable terminal;
S206 dynamically adjusts the parameter of preset strategy according to the motion state of portable terminal;
S208; The audio-video signal that utilizes the parameter of adjusted preset strategy that portable terminal is collected is encoded and transmission process; For example; Can adopt following flow data uploading protocol to upload audio-video signal to network: RTP (Real-time Transport Protocol, RTP), RTCP Real-time Transport Control Protocol (Real-time Transport Control Protocol, RTCP), real time flow medium host-host protocol (Real-time Transport Streaming Protocol; RTSP) or the real-time messages agreement (Real-Time Messaging Protocol, RTMP).
After this embodiment carries out format conversion (that is, signal having been carried out processed compressed) to the audio-video signal that collects, can under the situation that guarantees the audio-video signal quality, effectively save transmission bandwidth, thus the audio-video signal of high quality better.
In the 5th embodiment of the inventive method, specifically may further comprise the steps:
Step 1 is gathered audio-video signal through equipment such as the camera on the portable terminal, microphones;
Step 2 is analyzed the data of the mobile phone acceleration of gravity transducer that collects etc., finds the motion state of portable terminal;
Step 3 is encoded to the audio-video signal that collects according to the situation of change and the predefined strategy of motion state of mobile terminal;
Step 4 is transferred to the audio-video signal behind the coding in the network.
Wherein, the standard that the flow data uploading protocol of employing is compatible present comprises RTP, RTCP, RTSP or RTMP.
The strategy that is provided with in advance can comprise image definition preference strategy, Video Continuous property preference strategy or audio signal preference strategy.
Particularly, the image definition preference strategy comprises at least a in the following means: the resolution and the frame per second that reduces video coding that improve coded image.
Image continuity preference strategy comprises at least a in the following means: the resolution and the frame per second that improves video coding that reduce coded image.
The audio signal preference strategy comprises at least a in the following means: transmit static coded image and transmitting audio signal only.
In the 6th embodiment of the inventive method, specifically may further comprise the steps:
Step 1, equipment such as the camera on the initialization portable terminal, microphone are provided with resolution and sampling frame per second, the audio-video signal of acquisition source form;
Step 2, the motion state of perception portable terminal in several ways;
I) utilize the acceleration of gravity transducer that is built in portable terminal to obtain the motion state of portable terminal; Or
Ii) the video primitive frame that collects is analyzed, judged present frame whether clear (for example, can be relatively, some acutance method or edge sharpness method are judged) based on gray scale;
The iii) contrast through the consecutive frame data judges that mobile phone is whether in fast moving etc.;
Step 3 is obtained predefined strategy, dynamically adjusts tactful parameter according to the motion state of portable terminal, and the coding of audio-video signal is dynamically adjusted;
I) under the preferential situation of image definition, use CIF resolution, reduce the generation speed of I frame; For example, 10s generates a frame, and the P frame setting between the I frame and the difference of its reference frame are 0; Whole effect is that live video is clear, but might have discontinuous, the sense of beating between the image;
Ii) under the preferential situation of Video Continuous property, reduce resolution to QCIF (QuarterCommon Intermediate Format), press normal speed and produce the I frame, whole structure is that the continuity between the image is good, but picture size is less;
Iii) under the preferential situation of audio signal, a transmitting audio signal, it is lower that the I frame produces speed, for example, generated 1 frame in 1 minute, and the P frame setting between the I frame and the difference of its reference frame are 0;
Step 4 is with the audio-video signal transmission network side behind the coding.
Fig. 3 is the structural representation of first embodiment of portable terminal of the present invention.
As shown in Figure 3, the portable terminal of this embodiment can comprise:
SOT state of termination sensing module 11; Be used to obtain the motion state of portable terminal; For example; The data that can gather through analyte sensors or analyze the motion state of the frame of video perception portable terminal that the audio and video acquisition devices on the portable terminal gathers, wherein, that motion state can comprise is static, microinching and rapid movement;
For example; When the position of portable terminal and speed change; The acceleration of gravity transducer that is built in portable terminal can perceive motion; Can confirm from the information that the acceleration of gravity transducer obtains whether the motion state of portable terminal changes, thereby can utilize the data of the acceleration of gravity sensor acquisition that is built in portable terminal to confirm the motion state of portable terminal; Or utilize a plurality of frame of video signals that collect to compare, to confirm the motion state of portable terminal, for example, when mobile phone moved, there was displacement in same object in the consecutive frame, thereby can confirm the motion state of portable terminal according to the displacement situation; Or the vision signal that collects through the judgement motion state of clear definite portable terminal whether, for example, can be relatively based on gray scale, some acutance method or edge sharpness method are judged;
For example, if preset strategy is " image definition is preferential " strategy, and current parameter is CIF, 15fps; When perceiving motion of mobile terminals, can obtain the moving direction and the speed of portable terminal from acceleration of gravity transducer (api interface that for example, provides) through transducer; When the acceleration of portable terminal surpasses certain threshold value, for example, during 0.5G; Can think that motion state of mobile terminal is changing (promptly more quickly; Rapid movement), this moment original sampling frame per second (if camera does not support dynamically to change sampling frame per second, the frame per second of then will encoding) is dropped to 5fps to guarantee the definition of image from 15fps;
In this embodiment, preset strategy can be image definition preference strategy, Video Continuous property preference strategy or audio signal preference strategy.
Particularly, the image definition preference strategy comprises at least a in the resolution that improves coded image and the frame per second that reduces video coding.
Video Continuous property preference strategy comprises at least a in the resolution that reduces coded image and the frame per second that improves video coding.
The audio signal preference strategy comprises at least a in transmission static coded image and the transmitting audio signal.
This embodiment controls the coding and the transmission of the audio-video signal that collects based on the motion state of portable terminal and predetermined strategy; Under or uplink network band-limited situation limited, can utilize different strategies to satisfy requirements of different users in the portable terminal disposal ability.
Fig. 4 is the structural representation of second embodiment of portable terminal of the present invention.
As shown in Figure 4, to compare with embodiment among Fig. 3, the portable terminal of this embodiment can also comprise:
Audio-video collection module 21 is used for gathering in real time audio-video signal, for example, can gather audio-video signal through equipment such as the camera on the portable terminal, microphones;
Format converting module 22; Link to each other with audio-video collection module 21 and processing module 13; Be used for the audio-video signal that collects is carried out format conversion; For example, be the signal of forms such as H263, H264 with source format conversion of signals such as video RGB that collects or YUV, audio signal is converted into the signal of forms such as AAC.
After this embodiment carries out format conversion (that is, signal having been carried out processed compressed) to the audio-video signal that collects, can under the situation that guarantees the audio-video signal quality, effectively save transmission bandwidth, thus the audio-video signal of high quality better.
The foregoing description has solved the problem that bandwidth constraints of the prior art and portable terminal limited processing ability etc. are brought effectively, has greatly promoted the mobile multimedia terminal application and development.
Description of the invention provides for example with for the purpose of describing, and is not the disclosed form that exhaustively perhaps limit the invention to.A lot of modifications and variation are conspicuous for those of ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (14)
1. the processing method of an audio-video signal is characterized in that, said method comprises:
Obtain the motion state of portable terminal;
Dynamically adjust the parameter of preset strategy according to the motion state of said portable terminal;
The audio-video signal that utilizes the parameter of adjusted said preset strategy that said portable terminal is collected is encoded and transmission process.
2. method according to claim 1 is characterized in that, obtains the motion state of said portable terminal through following manner:
The data that utilization is built in the acceleration of gravity sensor acquisition of said portable terminal are confirmed the motion state of said portable terminal; Or
A plurality of frame of video signals that utilization collects are compared, to confirm the motion state of said portable terminal; Or
Whether the vision signal that collects through judgement the clear motion state of confirming said portable terminal.
3. method according to claim 1 is characterized in that, said preset strategy is image definition preference strategy, Video Continuous property preference strategy or audio signal preference strategy.
4. method according to claim 3 is characterized in that, said image definition preference strategy comprises at least a in the resolution that improves coded image and the frame per second that reduces video coding.
5. method according to claim 3 is characterized in that, said Video Continuous property preference strategy comprises at least a in the resolution that reduces coded image and the frame per second that improves video coding.
6. method according to claim 3 is characterized in that, said audio signal preference strategy comprises at least a in transmission static coded image and the transmitting audio signal.
7. according to each described method in the claim 4 to 6, it is characterized in that the step that said motion state according to portable terminal is dynamically adjusted the parameter of preset strategy comprises:
Dynamically adjust the resolution of coded image or the frame per second of video coding according to the motion state of said portable terminal, or transmission signals selectively.
8. method according to claim 1 is characterized in that, said method also comprises:
The said audio-video signal that collects is carried out format conversion.
9. a portable terminal is characterized in that, said terminal comprises:
SOT state of termination sensing module is used to obtain the motion state of portable terminal;
Control module links to each other with said SOT state of termination sensing module, is used for dynamically adjusting according to the motion state of said portable terminal the parameter of preset strategy;
Processing module links to each other with said control module, is used to utilize the parameter of adjusted said preset strategy that the audio-video signal that collects is encoded and transmission process.
10. terminal according to claim 9 is characterized in that, said preset strategy is image definition preference strategy, Video Continuous property preference strategy or audio signal preference strategy.
11. terminal according to claim 10 is characterized in that, said image definition preference strategy comprises at least a in the resolution that improves coded image and the frame per second that reduces video coding.
12. terminal according to claim 10 is characterized in that, said Video Continuous property preference strategy comprises at least a in the resolution that reduces coded image and the frame per second that improves video coding.
13. terminal according to claim 10 is characterized in that, said audio signal preference strategy comprises at least a in transmission static coded image and the transmitting audio signal.
14. terminal according to claim 9 is characterized in that, said terminal also comprises:
The audio-video collection module is used for gathering in real time audio-video signal;
Format converting module links to each other with said audio-video collection module and said processing module, is used for the said audio-video signal that collects is carried out format conversion.
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