CN102088622A - Multimedia information processing terminal - Google Patents
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Abstract
The present invention relates to a multimedia information processing terminal comprising a bus and an interface module used for collecting video and audio data, and multiplexing two-channel video and audio data with different code rates from a same signal source into one-channel multiplexed data. A group of time mark information corresponding to image frames is added into each image frame in the multiplexed data, and then the multiplexed data are transmitted through the bus, wherein the group of time mark information comprises a plurality of pieces of time mark information respectively corresponding to the video/audio data with different code rates; and a processing module is used for receiving the multiplexed data from the bus, aligning the video and audio data at different code rates and time references of the video and audio data according to the time mark information after demultiplexing the multiplexed data. The multimedia information processing terminal can satisfy the special demand of the broadcast-level video and audio application and provide the synchronization of high precision.
Description
Technical field
The present invention relates to the multimedia field, relate in particular to a kind of multimedia messages processing terminal.
Background technology
Existing multimedia collection and processing generally are the equipment that is separated from each other, when adopting USB interface to be connected between them; Although the USB host-host protocol itself provides isochronous mode (isochronous), can guarantee stable bandwidth and constant interval timing in the transmission course, the USB coffret also can be set up the parallel transmission that a plurality of independent transmission links are realized two-way height code check video/audio data flow at transmitting-receiving two-end, but USB is as the conventional data coffret, do not having special technique guarantee means aspect the high accuracy data synchronous transmission, still be difficult to guarantee that the height code rate data is accurate to the complete synchronous transmission of picture frame, also be difficult to guarantee data in the serial transmission process fully in real time and according to accurate sequence delivery.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of multimedia messages processing terminal, can be fit to the special requirement that broadcast level is looked voice applications, and high precision synchronous is provided.
In order to address the above problem, the invention provides a kind of multimedia messages processing terminal, comprising: bus;
Interface module, be used to gather video/audio, the video/audio of the different code checks of the two-way of same signal source is multiplexed with one road multiplex data, in described multiplex data for each picture frame add one group corresponding to behind the time tag information of this picture frame by described bus transfer; Described one group of time tag information comprise correspond respectively to different bit-rate video/voice datas time tag information each one;
Described processing module is used for receiving described multiplex data from described bus, demultiplexing after according to described time tag information the align video/audio of different code checks and the time reference of align video and voice data.
Preferably, in the multiplexing multiplex data that obtains of described interface module, each picture frame comprises frame head, the first bit-rate video data payload, the second bit-rate video data payload, the first code check voice data payload, the second code check voice data payload respectively;
Described interface module is meant for each picture frame adds one group of time tag information corresponding to this picture frame in multiplex data:
Described interface module adds the time tag information corresponding to these picture frame first bit-rate video data respectively before the first bit-rate video data payload of each picture frame in multiplex data, add time tag information before the second bit-rate video data payload corresponding to these picture frame second bit-rate video data, add time tag information before the first code check voice data payload, add time tag information before the second code check voice data payload corresponding to this picture frame second code check voice data corresponding to this picture frame first code check voice data.
Preferably, described processing module comprises:
Demultiplexing unit, being used for described multiplex data demultiplexing is video/audio;
Decoder module is used for the video/audio behind the demultiplexing is decoded;
Memory cell is used for the decoded video/audio of buffer memory;
Processing unit is used for the video/audio of buffer memory is handled, during processing according to described time tag information the align video/audio of different code checks and the time reference of alignment video and voice data.
Preferably, described processing module also comprises:
HDMI (High Definition Multimedia Interface) HDMI;
Output unit is used for to behind the described HDMI output decoder or the video/audio after handling;
Display unit is used for behind the output decoder or the video/audio after handling.
Preferably, described bus is a usb bus;
Described interface module and processing module respectively comprise a usb interface unit;
The usb interface unit of described interface module is used for described multiplex data is encapsulated as the usb data bag, produces handshake packet data in the USB transmission course according to described time tag information during encapsulation; Guarantee to send according to described handshake packet data according to the order of frame;
The usb interface unit of described processing module is used for guaranteeing to receive according to the order of frame according to described handshake packet data, and the described usb data bag of decapsulation;
Preferably, the usb interface unit of described interface module comprises that a usb data seals dress unit and USB physical interface;
The usb interface unit of described processing module comprises a usb data bag decapsulation unit and USB physical interface.
Preferably, described terminal also comprises:
The multiplexing module is passed through WIFI wireless network interaction data with described processing module, and the data after described processing module is handled send by one or more mode.
Preferably, described interface module comprises:
The interface of one or more type is used to gather dissimilar video/audios;
Correspond respectively to the resolution unit of all types of interfaces, be used to resolve the video/audio that pairing interface receives;
Memory cell is used for the video/audio after buffer memory is resolved;
The encoding compression unit is used for sending to described Multiplexing Unit after video/audio to described memory cell buffer memory compresses;
Generation unit, the time sequence information of the video/audio after being used for compressing according to the video/audio of described memory cell buffer memory and described encoding compression unit produces described time tag information;
Multiplexing Unit is used for the video/audio of the different code checks of the two-way of same signal source is multiplexed with one road multiplex data;
Lock unit is used for sending to described bus after described multiplex data adds one group of time tag information corresponding to this picture frame for each picture frame.
Preferably, the interface of described one or more type comprises possessing the ITization interface that broadcast level tapeless shoots with video-corder form; Described resolution unit comprises and described ITization no shadow bands formula specialty video recording system high-resolution protocol analysis unit and/or P2/P2 high-resolution protocol analysis unit; Data after described no shadow bands formula specialty video recording system high-resolution protocol analysis unit and/or P2/P2 high-resolution protocol analysis unit directly will be resolved send to described Multiplexing Unit.
Preferably, the interface of described one or more type comprises one or more with in the lower interface: digital serial interface, color difference components interface, hybrid interface;
Described resolution unit comprise with the corresponding digital serial interface protocol analysis of described digital serial interface unit, with color difference components interface and the corresponding AD conversion unit of hybrid interface.
Technical scheme of the present invention is with multimedia collection and handle combination, can guarantee that multichannel data is accurate to the complete synchronous transmission of picture frame, and data in the serial transmission process fully according to accurate sequence delivery; Prioritization scheme of the present invention can carry out the multiple Audio Processing of looking,, programming process class application synthetic such as editor, multichannel optimization transmission, global function video editing etc.; Another prioritization scheme of the present invention can be supported broadcast level specialty IO interface, and the broadcast level camera-shooting and recording device connection with main flow can provide more fully function.
Description of drawings
Fig. 1 is the schematic block diagram of a kind of multimedia messages processing terminal of embodiment one;
Fig. 2 is the schematic diagram of joining day information flag among the embodiment one.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Need to prove that if do not conflict, each feature among the embodiment of the invention and the embodiment can mutually combine, all within protection scope of the present invention.In addition, can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Embodiment one, and a kind of multimedia messages processing terminal as shown in Figure 1, comprising: bus;
Interface module, be used to gather video/audio, the video/audio of the different code checks of the two-way of same signal source is multiplexed with one road multiplex data, in described multiplex data for each picture frame add one group corresponding to behind the time tag information of this picture frame by described bus transfer; Described one group of time tag information comprise correspond respectively to different bit-rate video/voice datas time tag information each one;
Described processing module is used for receiving described multiplex data from described bus, demultiplexing after according to described time tag information the align video/audio of different code checks and the time reference of align video and voice data.
Present embodiment with the video/audio of different code checks multiplexing after, at the video/audio of transmission of one line after multiplexing only on the physical transmission link, can avoid adopting different transmission channels the asynchronous problem of different bit-rate videos that produces because of different transmission delays, different error condition.
Present embodiment can satisfy broadcast level and look following two crucial requirements of voice applications by embed 4 time tag informations that are accurate to picture frame in multiplexed data packets:
(1) broadcast level look voice applications need be when gathering video/audio, the synchronous different code check video/audios of while transmitting two paths, this two-way video/audio is from same signal source, can be not have the combination of compression/compressed audio and video data, it also can be the compressed audio and video data combination of height code check, the video/audio of high code rate is used for storage and output during final the application, and the remote transmission under high Network Transmission bandwidth situation, the video/audio of low code check is used for primary channel remote transmission and editor agency, therefore, this two-way video/audio must realize being accurate to the complete synchronous transmission of picture frame.
(2) broadcast level is looked voice applications and is required video/audio to have clear and definite time mark in transmission course, in the serial transmission process, need to utilize these time marks to guarantee (realtime) and accurately sequence delivery (keeping frame or field sequence) fully in real time in the transmission, carry out also needing time mark as the time reference data when Video Applications is handled.
In the present embodiment, described time tag information meets or compatible SMPTE (SMPTE) standard.
In the present embodiment, in the multiplexing multiplex data that obtains of described interface module, each picture frame can comprise frame head, the first bit-rate video data payload, the second bit-rate video data payload, the first code check voice data payload, the second code check voice data payload respectively as shown in Figure 2; Described frame head can comprise information such as the frame number, payload length, data type of this picture frame; Between each payload can but be not limited to be separated by with the frame number of this picture frame; During practical application, the order of each payload can be not limited to description above.
Described interface module specifically can be meant for each picture frame adds one group of time tag information corresponding to this picture frame in multiplex data:
Described interface module adds the time tag information corresponding to these picture frame first bit-rate video data respectively before the first bit-rate video data payload of each picture frame in multiplex data, add time tag information before the second bit-rate video data payload corresponding to these picture frame second bit-rate video data, add time tag information before the first code check voice data payload, add time tag information before the second code check voice data payload corresponding to this picture frame second code check voice data corresponding to this picture frame first code check voice data.
In the present embodiment, described interface module specifically can comprise:
The interface of one or more type is used to gather dissimilar video/audios;
Correspond respectively to the resolution unit of all types of interfaces, be used to resolve the video/audio that pairing interface receives;
Memory cell is used for the video/audio after buffer memory is resolved;
The encoding compression unit is used for sending to described Multiplexing Unit after video/audio to described memory cell buffer memory compresses;
Generation unit, the time sequence information of the video/audio after being used for compressing according to the video/audio of described memory cell buffer memory and described encoding compression unit produces described time tag information;
Multiplexing Unit is used for the video/audio of the different code checks of the two-way of same signal source is multiplexed with one road multiplex data; The video/audio of the different code checks of this two-way can be to come from described encoding compression unit, comes certainly in described memory cell; Also can all come from described memory cell, buffer memory is exactly the video/audio of different code checks in the promptly described memory cell; Also can all come from described encoding compression unit, promptly obtain the video/audio of different code checks according to different compression ratios; Can also come from a described memory cell/encoding compression unit and a resolution unit respectively; Also comprise alternate manner in the practical application;
Lock unit is used for sending to described bus after described multiplex data adds one group of time tag information corresponding to this picture frame for each picture frame.
In the present embodiment, the interface of described one or more type can comprise: possess the ITization interface that broadcast level tapeless shoots with video-corder form; Described resolution unit comprises HD (high-resolution) protocol analysis unit and/or P2/P2HD protocol analysis unit with described ITization XDCAM (no shadow bands formula specialty video recording system); Data after described XDCAM HD protocol analysis unit and/or P2/P2HD protocol analysis unit directly will be resolved send to described Multiplexing Unit.
In the present embodiment, the interface of described one or more type can also comprise one or more with in the lower interface: SDI (serial digital interface, digital serial interface), YUV (color difference components interface), Composite interface (hybrid interface) etc.; Accordingly, described resolution unit can comprise with the corresponding SDI protocol analysis of described SDI unit, with described YUV and the corresponding AD conversion unit of Composite interface etc.
In the present embodiment, described processing module specifically can comprise:
Demultiplexing unit, being used for described multiplex data demultiplexing is video/audio;
Decoder module is used for the video/audio behind the demultiplexing is decoded;
Memory cell is used for the decoded video/audio of buffer memory;
Processing unit is used for according to extraneous needs the video/audio of buffer memory being handled,, programming process class application synthetic such as editor, multichannel optimization transmission, global function video editing etc.; During processing according to described time tag information the align video/audio of different code checks and the time reference of alignment video and voice data.
In the present embodiment, described processing module can also comprise: HDMI (High Definition MultimediaInterface, HDMI (High Definition Multimedia Interface));
Output unit is used for to behind the described HDMI output decoder or the video/audio after handling.
In the present embodiment, described processing module can also comprise:
Display unit is used for behind the output decoder or the video/audio after handling.
In the present embodiment, described bus can but be not limited to usb bus;
Described interface module and processing module respectively also comprise a usb interface unit;
The usb interface unit of described interface module is used for described multiplex data is encapsulated as the usb data bag, produces handshake packet data in the USB transmission course according to described time tag information during encapsulation; Guarantee to send according to described handshake packet data according to the order of frame; The usb interface unit of described interface module can comprise that a usb data seals dress unit and USB physical interface;
The usb interface unit of described processing module is used for guaranteeing to receive according to the order of frame according to described handshake packet data, and the described usb data bag of decapsulation; The usb interface unit of described processing module can comprise a usb data bag decapsulation unit and USB physical interface.
In the present embodiment, described multimedia messages processing terminal can also comprise:
The multiplexing module, with described processing module can but be not limited to by wireless network interaction datas such as WIFI or 3G, the data after described processing module can being handled send by one or more mode.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, described program can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of claim of the present invention.
Claims (10)
1. a multimedia messages processing terminal is characterized in that, comprising: bus;
Interface module, be used to gather video/audio, the video/audio of the different code checks of the two-way of same signal source is multiplexed with one road multiplex data, in described multiplex data for each picture frame add one group corresponding to behind the time tag information of this picture frame by described bus transfer; Described one group of time tag information comprise correspond respectively to different bit-rate video/voice datas time tag information each one;
Described processing module is used for receiving described multiplex data from described bus, demultiplexing after according to described time tag information the align video/audio of different code checks and the time reference of align video and voice data.
2. terminal as claimed in claim 1 is characterized in that:
In the multiplexing multiplex data that obtains of described interface module, each picture frame comprises frame head, the first bit-rate video data payload, the second bit-rate video data payload, the first code check voice data payload, the second code check voice data payload respectively;
Described interface module is meant for each picture frame adds one group of time tag information corresponding to this picture frame in multiplex data:
Described interface module adds the time tag information corresponding to these picture frame first bit-rate video data respectively before the first bit-rate video data payload of each picture frame in multiplex data, add time tag information before the second bit-rate video data payload corresponding to these picture frame second bit-rate video data, add time tag information before the first code check voice data payload, add time tag information before the second code check voice data payload corresponding to this picture frame second code check voice data corresponding to this picture frame first code check voice data.
3. terminal as claimed in claim 1 is characterized in that, described processing module comprises:
Demultiplexing unit, being used for described multiplex data demultiplexing is video/audio;
Decoder module is used for the video/audio behind the demultiplexing is decoded;
Memory cell is used for the decoded video/audio of buffer memory;
Processing unit is used for the video/audio of buffer memory is handled, during processing according to described time tag information the align video/audio of different code checks and the time reference of alignment video and voice data.
4. terminal as claimed in claim 3 is characterized in that, described processing module also comprises:
HDMI (High Definition Multimedia Interface) HDMI;
Output unit is used for to behind the described HDMI output decoder or the video/audio after handling;
Display unit is used for behind the output decoder or the video/audio after handling.
5. terminal as claimed in claim 1 is characterized in that:
Described bus is a usb bus;
Described interface module and processing module respectively comprise a usb interface unit;
The usb interface unit of described interface module is used for described multiplex data is encapsulated as the usb data bag, produces handshake packet data in the USB transmission course according to described time tag information during encapsulation; Guarantee to send according to described handshake packet data according to the order of frame;
The usb interface unit of described processing module is used for guaranteeing to receive according to the order of frame according to described handshake packet data, and the described usb data bag of decapsulation.
6. terminal as claimed in claim 5 is characterized in that:
The usb interface unit of described interface module comprises that a usb data seals dress unit and USB physical interface;
The usb interface unit of described processing module comprises a usb data bag decapsulation unit and USB physical interface.
7. terminal as claimed in claim 1 is characterized in that, also comprises:
The multiplexing module is passed through WIFI wireless network interaction data with described processing module, and the data after described processing module is handled send by one or more mode.
8. as each described terminal in the claim 1 to 7, it is characterized in that described interface module comprises:
The interface of one or more type is used to gather dissimilar video/audios;
Correspond respectively to the resolution unit of all types of interfaces, be used to resolve the video/audio that pairing interface receives;
Memory cell is used for the video/audio after buffer memory is resolved;
The encoding compression unit is used for sending to described Multiplexing Unit after video/audio to described memory cell buffer memory compresses;
Generation unit, the time sequence information of the video/audio after being used for compressing according to the video/audio of described memory cell buffer memory and described encoding compression unit produces described time tag information;
Multiplexing Unit is used for the video/audio of the different code checks of the two-way of same signal source is multiplexed with one road multiplex data;
Lock unit is used for sending to described bus after described multiplex data adds one group of time tag information corresponding to this picture frame for each picture frame.
9. terminal as claimed in claim 8 is characterized in that:
The interface of described one or more type comprises possessing the ITization interface that broadcast level tapeless shoots with video-corder form; Described resolution unit comprises and described ITization no shadow bands formula specialty video recording system high-resolution protocol analysis unit and/or P2/P2 high-resolution protocol analysis unit; Data after described no shadow bands formula specialty video recording system high-resolution protocol analysis unit and/or P2/P2 high-resolution protocol analysis unit directly will be resolved send to described Multiplexing Unit.
10. terminal as claimed in claim 8 is characterized in that:
The interface of described one or more type comprises one or more with in the lower interface: digital serial interface, color difference components interface, hybrid interface;
Described resolution unit comprise with the corresponding digital serial interface protocol analysis of described digital serial interface unit, with color difference components interface and the corresponding AD conversion unit of hybrid interface.
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Application publication date: 20110608 |