CN103974089A - Wireless audio and video transmitter and wireless audio and video processing method - Google Patents
Wireless audio and video transmitter and wireless audio and video processing method Download PDFInfo
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- CN103974089A CN103974089A CN201310048016.5A CN201310048016A CN103974089A CN 103974089 A CN103974089 A CN 103974089A CN 201310048016 A CN201310048016 A CN 201310048016A CN 103974089 A CN103974089 A CN 103974089A
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Abstract
The invention provides a wireless audio and video transmitter and a wireless audio and video processing method. The transmitter comprises an audio encoder used for compressing and encoding the audio stream, a video encoder used for compressing and encoding the video stream, a multiplexer, a transmission processor and an emission front end. The video encoder comprises more than two varieties of delay modes allowing different delays. The multiplexer is connected to the audio encoder and the video encoder and is used for multiplexing the audio code stream output by the audio encoder and the video code stream output by the video encoder to generate one single code stream. The transmission processor is used for performing base band signal transmission processing to the single code stream and is connected to the multiplexer. The emission front end is used for converting signals output by the transmission processor into radio frequency analog signals and is connected to the transmission processor. According to the wireless audio and video transmitter, the video encoder is a multi-delay one almost, the delay mode can be selected, and application prospect is promised.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of wireless audio and video transmitter and wireless audio and video processing method.
Background technology
Along with the development of Digital Television, family wireless audio video transmission technology also makes great progress.Traditional transmitting set often adopts discrete element to realize, and is seated on high television tower, and transmitting power is generally kilowatt, and the cost that needs are higher, is unfavorable for being applied in average family.And, user is not only confined to listen to/see the audio/video in Digital Television to the demand of Digital Television, sometimes also need other equipment, play as the audio frequency and video on computer, game machine, DVD, blue light player, karaoke system etc. are sent on digital television.For example, by computer uploaded videos image to Digital Television; Or the video image of the game on game machine is uploaded to Digital Television, obtains the effect of better watching video image or playing by Digital Television.But user is to being to have different requirements by the transmission of video images of the video image on computer and game to the time delay in Digital Television.As: user for by the transmission of video images on computer to the time delay in Digital Television, can allow larger time delay; User, for the transmission of video images on game machine is more responsive to the time delay of Digital Television, only allows less time delay, is no more than 20 milliseconds.But the video encoder of the transmitting set of available technology adopting only has single delay mode.
Therefore, in prior art, having the video encoder in transmitting set is single delay mode encoder, and user cannot carry out delay mode selection, makes the limited problem of its use scenes.
Summary of the invention
The invention provides a kind of wireless audio and video transmitter and wireless audio and video processing method, can solve the video encoder in transmitting set in prior art is single delay mode encoder, user cannot carry out delay mode selection, makes the limited problem of its use scenes.
On the one hand, the invention provides a kind of wireless audio and video transmitter, comprising:
For the audio coder that audio stream is carried out to compressed encoding processing;
For the video encoder that video flowing is carried out to compressed encoding processing, described video encoder comprises two or more delay modes, and the time delay that each delay mode allows is different;
Multiplexer, is connected with described audio coder and described video encoder respectively, and the video code flow of exporting for the audio code stream to described audio coder output, described video encoder carries out multiplexing, generates single code stream;
For the transmission processor that described single code stream is carried out to base band signal transmission processing, described transmission processor is connected with described multiplexer;
For the signal of described transmission processor output being converted to the front end of emission of radio frequency analog signal, described front end of emission is connected with described transmission processor.
On the other hand, the invention provides a kind of wireless audio and video processing method, comprising:
Audio coder carries out compressed encoding processing to audio stream;
Video encoder carries out compressed encoding processing to video flowing, and described video encoder comprises two or more delay modes, and the time delay that each delay mode allows is different;
Multiplexer carries out multiplexing to described compressed encoding audio code stream after treatment and described compressed encoding video code flow after treatment, generate single code stream;
Transmission processor carries out base band signal transmission processing to described single code stream;
Signal after treatment described base band signal transmission is converted to radio frequency analog signal by front end of emission.
As shown from the above technical solution, the embodiment of the present invention comprises two or more delay modes by the video encoder of wireless audio and video transmitter, and the time delay that each delay mode allows is different, can realize the selection of user to delay mode.Can solve the video encoder in transmitting set in prior art is single delay mode encoder, and user cannot carry out delay mode selection, makes the limited problem of its use scenes.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of wireless audio and video processing method one embodiment that Fig. 1 provides for the embodiment of the present invention;
The structural representation of wireless audio and video transmitter one embodiment that Fig. 2 provides for the embodiment of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The present invention has provided a kind of wireless audio and video transmitter, concrete, this wireless audio and video transmitter can be applied in average family, and the video encoder of this wireless audio and video transmitter comprises two or more delay modes, and the time delay that each delay mode allows is different, particularly, the time delay that each delay mode allows is difference completely, also can part identical.User can select delay mode according to actual needs.Optionally, described wireless audio and video transmitter comprises the first video encoding module and the second video encoding module, corresponding the first delay mode of described the first time delay module, corresponding the second delay mode of described the second video encoding module, and the time delay that the time delay of the first delay mode permission allows than the second delay mode is large, also distinguishes corresponding high delay mode and low-delay mode.These the two kinds video encoding module with different delayed time pattern can be applied to coding time delay to the video flowing of different requirements.
Optionally, what the first delay mode of the first video encoding module was corresponding is " film mode ", and described " film mode " is insensitive to time delay, allows higher time delay; What the second delay mode of the second video encoding module was corresponding is " game mode ", and described " game mode " is more responsive to time delay, only allows lower time delay, is no more than 20 milliseconds.As: the first video encoding module that the first delay mode is corresponding can be applied to the coding of the video of computer transmission, realizes after high time delay coding, sends to digital television, is carried out the broadcasting of video by digital television; The second video encoding module that the second delay mode is corresponding can be applied to the coding of the game video of game machine transmission, realizes after low delay coding, sends to digital television, carries out the broadcasting of game video.Can realize the selection of delay mode, can solve the video encoder in transmitting set in prior art is single delay mode encoder, and user cannot carry out delay mode selection, makes the limited problem of its use scenes.
The flow chart of wireless audio and video processing method one embodiment that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, the present embodiment comprises:
101: audio coder carries out compressed encoding processing to audio stream;
Wherein, described audio coder meets standard as AC-3, MPEG-2AAC, MPEG-4AAC, AVS etc., also can meet the combination of above-mentioned multiple standards, also can meet other new standards.
102: video encoder adopts a delay mode to carry out compressed encoding processing to video flowing; Described video encoder comprises two or more delay modes, and the time delay that each delay mode allows is different;
Wherein, described video encoder meets standard as: MPEG-2 video, AVS video, the standard such as H.264, also can meet the combination of above-mentioned multiple standards, also can meet other new standards.
Optionally, described video encoder comprises: the first delay mode and the second delay mode;
Optionally, the time delay that the time delay that described the first delay mode allows allows than described the second delay mode is large, and what described the first delay mode was corresponding is high delay mode, and what described the second delay mode was corresponding is low-delay mode.
Optionally, what described the first delay mode was corresponding is " film mode ", described " film mode " is insensitive to time delay, allow higher time delay, when transmission of video is given described video encoder by computer, select described the first delay mode by described video encoder, realize the high time delay coding of the video to computer transmission.
Optionally, what described the second delay mode was corresponding is " game mode ", described " game mode " is more responsive to time delay, only allow lower time delay to be no more than 20 milliseconds, when game video is transferred to described video encoder by game machine, select described the second delay mode by described video encoder, to realize the low delay coding of the game video to game machine transmission.
Wherein, describedly be no more than 20 milliseconds and comprised the described transmission processor of described wireless audio and video transmitter and the processing time of described front end of emission, and digital television receives after the game video that described wireless audio and video transmitter sends, game video is carried out to the processing time of demodulation code etc.
Optionally, described video encoder, also comprises: a single-pole double-throw switch (SPDT).
Optionally, can give the requirement to propagation delay time of the video of described video encoder according to actual transmissions, select in described the first delay mode and described the second delay mode by described single-pole double-throw switch (SPDT).
Optionally, when user will be transmitted the extremely described video encoder of game video on game machine, because the game video on game machine requires stricter to propagation delay time, be no more than 20 milliseconds, can, by selected described the second delay mode by described single-pole double-throw switch (SPDT), carry out low delay coding to the game video of described game machine output.
Wherein, it will be appreciated by persons skilled in the art that the embodiment of the present invention is not limited to the above-mentioned method of described the first delay mode and described the second delay mode being selected by single-pole double-throw switch (SPDT).
Wherein, it will be appreciated by persons skilled in the art that the delay mode of video encoder described in the embodiment of the present invention, can also have according to actual needs multiple delay mode, be not limited to the first above-mentioned delay mode and the second delay mode.
103: multiplexer carries out multiplexing to described compressed encoding audio code stream after treatment and described compressed encoding video code flow after treatment, generate single code stream;
Optionally, described multiplexer can also be used for the video code flow of the audio code stream to the output of described audio coder, the output of described video encoder, and data and control signal carry out multiplexingly, generates single code stream;
Wherein, described data and control signal are captions that described audio code stream and described video code flow are corresponding etc.
Optionally, described multiplexer can be carried out the handling process meeting as the multiplexing standard of MPEG-2.
104: transmission processor carries out base band signal transmission processing to described single code stream;
Wherein, described transmission processor, for carrying out the base band signal transmission handling process meeting as standards such as ATSC, DVB-T, DTMB and ISDB-T, also can be carried out the combination of above-mentioned multiple standards, also can carry out other new base band signal transmission cleanup standards.
105: signal after treatment described base band signal transmission is converted to radio frequency analog signal by front end of emission.
Optionally, described front end of emission can also amplify processing to described radio frequency analog signal by low power amplifier.
Wherein, the power that described process low power amplifier amplifies analog radio-frequency signal after treatment is still fainter.
Optionally, the amplifying power of described low power amplifier is dynamically adjustable.
Optionally, the amplifying power of described low power amplifier can be adjusted according to the transmitting range of wireless audio and video transmitter, as: when as described in wireless audio and video transmitter to indoor digital television transmission of video, about 30 meters, the transmitting power needing is 5mW; When described wireless audio and video transmitter is to outdoor digital television transmission of video, distance increases, and the transmitting power approximately needing is 10mW, can be by described low power amplifier is regulated, to meet the demand of different situations.
Wherein, the amplifying power of described low power amplifier is dynamically adjustable, makes user can select according to different situations the amplifying power of described low power amplifier, thereby can reduce the power consumption of described wireless audio and video transmitter.
Wherein, in order to obtain the radiofrequency signal of relatively high power, described method also comprises:
By power amplifier, described radio frequency analog signal is amplified to processing.
Optionally, described audio coder, described video encoder, described multiplexer, described transmission processor and described front end of emission are integrated to be arranged in a chip, and cost is low, reduces power consumption.
In addition, described video encoder adopts the delay mode that time delay is zero to carry out compressed encoding processing to video flowing.
Optionally, described time delay is that zero delay mode is " game mode ", for straight-through subpattern, in the time that the video of input is the game video of game machine transmission, described video encoder also can be selected this delay mode by described single-pole double-throw switch (SPDT), now, described video encoder does not carry out video compression coding processing to the game video of game machine transmission.
Optionally, the time delay of described the second delay mode is that to be described time delay at 1 o'clock be zero delay mode.
The present embodiment comprises that by the video encoder of wireless audio and video transmitter the time delay of two or more delay modes and the permission of each delay mode is different, can realize the selection of user to delay mode.Can solve the video encoder in transmitting set in prior art is single delay mode encoder, and user cannot carry out delay mode selection, makes the limited problem of its use scenes;
Further, the embodiment of the present invention is arranged in a chip by audio coder, video encoder, multiplexer, transmission processor and front end of emission are integrated, cost is low, reduce power consumption, and front end of emission is provided with power amplifier, can realize the dynamic adjustment of amplifying power, also can reduce power consumption.
The structural representation of wireless audio and video transmitter one embodiment that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, the wireless audio and video transmitter of the present embodiment comprises: audio coder 21, video encoder 22, multiplexer 23, transmission processor 24 and front end of emission 25;
Wherein, described audio coder is for carrying out compressed encoding processing to audio stream;
Wherein, described audio coder meets standard as AC-3, MPEG-2AAC, MPEG-4AAC, AVS etc., also can meet the combination of above-mentioned multiple standards, also can meet other new standards.
Wherein, described video encoder is for carrying out compressed encoding processing to video flowing; Described video encoder comprises two or more delay modes, and the time delay that each delay mode allows is different;
Optionally, described video encoder comprises:
The first video encoding module and the second video encoding module;
Described the first video encoding module, corresponding the first delay mode;
Described the second video encoding module, corresponding the second delay mode;
And the time delay that the time delay that described the first delay mode allows allows than described the second delay mode is large.
Wherein, described video encoder meets standard as: MPEG-2 video, AVS video, the standard such as H.264, also can meet the combination of above-mentioned multiple standards, also can meet other new standards.
Wherein, described video encoder can design according to the several modes of above-mentioned Standard Selection necessity in circuit, thereby can reduce the power consumption of wireless audio and video transmitter.
Optionally, corresponding the first delay mode of described the first video encoding module is high delay mode, and corresponding the second delay mode of described the second video encoding module is low-delay mode.
Optionally, corresponding the first delay mode of described the first video encoding module is high delay mode, can be applied to by computer transmission of video to described the first video encoding module, realizes the high time delay coding of video to computer transmission.
Optionally, corresponding the second delay mode of described the second video encoding module is low-delay mode, can be applied to game machine game video is transferred to described the second video encoding module, to realize the low delay coding of the game video to game machine transmission.
Optionally, described video encoder, also comprises: a single-pole double-throw switch (SPDT); Described single-pole double-throw switch (SPDT) connects described the first video encoding module and described the second video encoding module.
Optionally, user can give the requirement to propagation delay time of the video of described video encoder according to actual transmissions, selects in described the first video encoding module and described the second video encoding module by described single-pole double-throw switch (SPDT).
Optionally, when user will be transmitted the extremely described video encoder of game video on game machine, because the game video on game machine requires stricter to propagation delay time, be no more than 20 milliseconds, user can, by described single-pole double-throw switch (SPDT) being connected to described the second video encoding module, carry out low delay coding by described the second video encoding module to the game video of described game machine output.
Wherein, describedly be no more than 20 milliseconds and comprised the described transmission processor of described wireless audio and video transmitter and the processing time of described front end of emission, and digital television receives after the game video that described wireless audio and video transmitter sends, game video is carried out to the processing time of demodulation code etc.
Wherein, it will be appreciated by persons skilled in the art that the embodiment of the present invention is not limited to the above-mentioned method of described the first video encoding module and described the second video encoding module being selected by single-pole double-throw switch (SPDT).
Wherein, it will be appreciated by persons skilled in the art that the delay mode of video encoder described in the embodiment of the present invention, can also have according to actual needs multiple delay mode, be not limited to the first above-mentioned delay mode and the second delay mode.
Wherein, described multiplexer is connected with described audio coder and described video encoder respectively, and the video code flow of exporting for the audio code stream to described audio coder output, described video encoder carries out multiplexing, generates single code stream.
Optionally, described multiplexer can also be used for the video code flow of the audio code stream to the output of described audio coder, the output of described video encoder, and data and control signal carry out multiplexingly, generates single code stream;
Wherein, described data and control signal are captions that described audio code stream and described video code flow are corresponding etc.
Optionally, described multiplexer can be carried out the handling process meeting as the multiplexing standard of MPEG-2.
Wherein, described transmission processor is connected with described multiplexer; Described transmission processor is for carrying out base band signal transmission processing to described single code stream.
Wherein, described transmission processor, for carrying out the base band signal transmission handling process meeting as standards such as ATSC, DVB-T, DTMB and ISDB-T, also can be carried out the combination of above-mentioned multiple standards, also can carry out other new base band signal transmission cleanup standards.
Wherein, described front end of emission is connected with described transmission processor; Described front end of emission is for being converted to radio frequency analog signal by the signal of described transmission processor output.
Described front end of emission can comprise digital to analog converter and upconverter, can also comprise low power amplifier.Wherein, described digital to analog converter is for being converted to analog signal by the signal of described transmission processor output, and described upconverter, for described analog signal is carried out to frequency translation, obtains radio frequency analog signal; Described low power amplifier is for amplifying processing to the described radio frequency analog signal of process.
Wherein, described digital to analog converter is connected with described upconverter, and described upconverter is connected with described low power amplifier.
Wherein, the power that described process low power amplifier amplifies analog radio-frequency signal after treatment is still fainter.
Optionally, the amplifying power of described low power amplifier is dynamically adjustable.
Optionally, the amplifying power of described low power amplifier can be adjusted according to the transmitting range of wireless audio and video transmitter, as: when as described in wireless audio and video transmitter to indoor digital television transmission of video, about 30 meters, the transmitting power needing is 5mW; When described wireless audio and video transmitter is to outdoor digital television transmission of video, distance increases, and the transmitting power approximately needing is 10mW, can be by described low power amplifier is regulated, to meet the demand of different situations.
Wherein, the amplifying power of described low power amplifier is dynamically adjustable, makes user can select according to different situations the amplifying power of described low power amplifier, thereby can reduce the power consumption of described wireless audio and video transmitter.
Optionally, in order to obtain the radiofrequency signal of relatively high power, described wireless audio and video transmitter can also comprise:
For described radio frequency analog signal being amplified to the power amplifier of processing;
Optionally, described power amplifier, in described wireless audio and video transmitter, is connected with described front end of emission.
Optionally, described audio coder, described video encoder, described multiplexer, described transmission processor and described front end of emission are integrated to be arranged in a chip, the pattern of this integrated circuit makes the cost of described wireless audio and video transmitter low, and can reduce the power consumption of described wireless audio and video transmitter.And the transmitting power of described wireless audio and video transmitter is no more than 10 watts, the area of described chip is not more than 100 square millimeters, is highly less than 5 millimeters.
In addition, described video encoder also comprises that time delay is zero delay mode.
Optionally, corresponding the 3rd video encoding module of delay mode that described time delay is zero;
Optionally, the delay mode that described time delay corresponding to described the 3rd video encoding module is zero is " game mode ", for straight-through subpattern, in the time that the video of input is the game video of game machine transmission, described video encoder also can select described the 3rd video encoding module not carry out video compression coding processing to the game video of game machine transmission by described single-pole double-throw switch (SPDT).
Wherein, the time delay of described the second delay mode corresponding to described the second video encoding module is 1 o'clock, and described the second video encoding module and described the 3rd video encoding module are same video encoding module.
The present embodiment comprises two or more delay modes by the video encoder of wireless audio and video transmitter, and the time delay that each delay mode allows is different, can realize the selection of user to delay mode.Can solve the video encoder in transmitting set in prior art is single delay mode encoder, and user cannot carry out delay mode selection, makes the limited problem of its use scenes;
Further, the embodiment of the present invention is arranged in a chip by audio coder, video encoder, multiplexer, transmission processor and front end of emission are integrated, cost is low, reduce power consumption, and front end of emission is provided with power amplifier, can realize the dynamic adjustment of amplifying power, also can reduce power consumption.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a wireless audio and video transmitter, is characterized in that, comprising:
For the audio coder that audio stream is carried out to compressed encoding processing;
For the video encoder that video flowing is carried out to compressed encoding processing, described video encoder comprises two or more delay modes, and the time delay that each delay mode allows is different;
Multiplexer, is connected with described audio coder and described video encoder respectively, and the video code flow of exporting for the audio code stream to described audio coder output, described video encoder carries out multiplexing, generates single code stream;
For the transmission processor that described single code stream is carried out to base band signal transmission processing, described transmission processor is connected with described multiplexer;
For the signal of described transmission processor output being converted to the front end of emission of radio frequency analog signal, described front end of emission is connected with described transmission processor.
2. wireless audio and video transmitter according to claim 1, is characterized in that, described video encoder also comprises that time delay is zero delay mode.
3. wireless audio and video transmitter according to claim 1, is characterized in that, also comprises:
For described radio frequency analog signal being amplified to the power amplifier of processing.
4. wireless audio and video transmitter according to claim 1, is characterized in that, described audio coder, described video encoder, described multiplexer, described transmission processor and described front end of emission are integrated to be arranged in a chip.
5. wireless audio and video transmitter according to claim 1, is characterized in that, the transmitting power of described wireless audio and video transmitter is no more than 10 watts.
6. wireless audio and video transmitter according to claim 4, is characterized in that, the area of described chip is not more than 100 square millimeters, is highly less than 5 millimeters.
7. a wireless audio and video processing method, is characterized in that, comprising:
Audio coder carries out compressed encoding processing to audio stream;
Video encoder carries out compressed encoding processing to video flowing, and described video encoder comprises two or more delay modes, and the time delay that each delay mode allows is different;
Multiplexer carries out multiplexing to described compressed encoding audio code stream after treatment and described compressed encoding video code flow after treatment, generate single code stream;
Transmission processor carries out base band signal transmission processing to described single code stream;
Signal after treatment described base band signal transmission is converted to radio frequency analog signal by front end of emission.
8. method according to claim 7, is characterized in that, also comprises:
Described video encoder adopts the delay mode that time delay is zero to carry out compressed encoding processing to video flowing.
9. method according to claim 7, is characterized in that, also comprises:
By power amplifier, described radio frequency analog signal is amplified to processing.
10. method according to claim 7, is characterized in that, described audio coder, described video encoder, described multiplexer, described transmission processor and described front end of emission are integrated to be arranged in a chip.
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| CN103974089B (en) | 2017-07-28 |
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