CN102301730A - Method, device and system for transmitting and processing multichannel AV - Google Patents
Method, device and system for transmitting and processing multichannel AV Download PDFInfo
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- CN102301730A CN102301730A CN2011800012268A CN201180001226A CN102301730A CN 102301730 A CN102301730 A CN 102301730A CN 2011800012268 A CN2011800012268 A CN 2011800012268A CN 201180001226 A CN201180001226 A CN 201180001226A CN 102301730 A CN102301730 A CN 102301730A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2365—Multiplexing of several video streams
Abstract
The present invention discloses a method, a device and a system for transmitting and processing multichannel AV (Audio/Video). The method comprises the steps of: respectively obtaining multichannel AV code stream; in a merging processing link, merging the each channel AV code stream into at least one channel composite code stream, wherein the each channel AV code stream merged in the composite code stream is correspondingly provided with a code stream identification used for identifying the AV code stream belonged to; and transmitting the composite code stream to an AV receiving terminal based on a network transport protocol for indicating the AV receiving terminal to divide the composite code stream into the each channel AV code stream according to the code stream identification. The method of the present invention integrates the multichannel AV code stream into the at least one channel composite code stream so as to reduce number of the AV code stream, thus when the code stream is transmitted by the network, the network channel is no need to be occupied independently, and the phenomenon that some channels are busy and some channels are free will not occur, thereby fully taking advantage of network resource and raising transmiting effciency.
Description
Technical field
The embodiment of the invention relates to data processing technique, relates in particular to a kind of multichannel audio-video frequency transmission and processing method, Apparatus and system.
Background technology
Along with the development of stream media technology, the multichannel audio-video frequency technology is used widely.In field of video monitoring, people unify safety monitoring by Multipath Video Monitoring System to compass of competency especially.Along with the development of integrated degree, the way of video is more and more, and coding/decoding capability, net biography ability and whole system performance have all been proposed challenge; And along with increasing of way, the multichannel synchronous playing also becomes current a great problem.
Prior art is when realizing the multichannel synchronous playing, common method is with each road audio frequency and video individual processing separately, from data acquisition, coding, Network Transmission, again to decoding and output, all be to control alone, just the Synchronous Processing of playing at output stage is done a splicing and is exported on a display for many pictures when output.This scheme makes each passage have good independence, and control is simple.Some passages are out of order does not influence the normal operation of other passages, and the audio-video code stream that separate, stored is noted can be play for other universal player easily.
But in realizing process of the present invention, the inventor finds that there is following defective at least in prior art: Network Transmission need take a plurality of passages and transmit each road audio-video code stream independently, the waste Internet resources.
Summary of the invention
The embodiment of the invention provides a kind of multichannel audio-video frequency transmission and processing method, Apparatus and system, to optimize the utilization of network transmission resource.
The embodiment of the invention provides a kind of multichannel audio-video frequency transmission method, comprising:
Obtain the multichannel audio-video frequency code stream respectively;
Merging processing links, each road audio-video code stream is incorporated in the composite bit stream of at least one road, wherein, the every road audio-video code stream correspondence that is incorporated in the composite bit stream is provided with the code stream identification that is used to identify affiliated audio-video code stream;
Host-host protocol Network Based transmits described composite bit stream to the audio frequency and video receiving terminal, becomes each road audio-video code stream to indicate described audio frequency and video receiving terminal according to described code stream identification described composite bit stream to be split.
The embodiment of the invention also provides a kind of multichannel audio-video frequency processing method, comprising:
Host-host protocol Network Based receives at least one road composite bit stream of audio frequency and video transmitting terminal transmission;
In the deconsolidation process link,, described composite bit stream fractionation is become each road audio-video code stream according to the code stream identification that is provided with corresponding to every road audio-video code stream;
Each road audio-video code stream after splitting is handled respectively.
The embodiment of the invention also provides a kind of multichannel audio-video frequency transmitting device, comprising:
The code stream acquisition module is used for obtaining respectively the multichannel audio-video frequency code stream;
Code stream merges module, is used for merging processing links each road audio-video code stream being incorporated in the composite bit stream of at least one road, and wherein, the every road audio-video code stream correspondence that is incorporated in the composite bit stream is provided with the code stream identification that is used to identify affiliated audio-video code stream;
The code stream transport module is used for host-host protocol Network Based and transmits described composite bit stream to the audio frequency and video receiving terminal, becomes each road audio-video code stream to indicate described audio frequency and video receiving terminal according to described code stream identification described composite bit stream to be split.
The embodiment of the invention also provides a kind of multichannel audio-video frequency processing unit, comprising:
The code stream receiver module is used at least one road composite bit stream that host-host protocol Network Based receives the transmission of audio frequency and video transmitting terminal;
Code stream splits module, is used in the deconsolidation process link, according to the code stream identification that is provided with corresponding to every road audio-video code stream, described composite bit stream fractionation is become each road audio-video code stream;
The code stream processing module is used for each the road audio-video code stream after splitting is handled respectively.
The embodiment of the invention also provides a kind of multichannel audio-video frequency treatment system, comprising: multichannel audio-video frequency transmitting device that any embodiment of the present invention provided and multichannel audio-video frequency processing unit.
Multichannel audio-video frequency transmission provided by the invention and processing method, Apparatus and system, solved the problem of remote playing multichannel audio-video frequency, by the multichannel audio-video frequency code stream being integrated at least one road composite bit stream, reduced the quantity of audio-video code stream, therefore by the Network Transmission code stream time, need not independently to take network channel and some channel busy phenomenon of some passage free time occurs, thereby can utilize Internet resources fully, improve efficiency of transmission.
Description of drawings
The flow chart of the multichannel audio-video frequency transmission method that Fig. 1 provides for the embodiment of the invention one;
The flow chart of the multichannel audio-video frequency transmission method that Fig. 2 provides for the embodiment of the invention two;
Fig. 3 A carries out the schematic diagram that data message merges in the embodiment of the invention two;
Fig. 3 B is the structural representation of data message in the embodiment of the invention two;
Fig. 3 C is the structural representation of data message frame head in the embodiment of the invention two;
The flow chart of the multichannel audio-video frequency processing method that Fig. 4 provides for the embodiment of the invention three;
The flow chart of the multichannel audio-video frequency processing method that Fig. 5 provides for the embodiment of the invention four;
The flow chart of the multichannel audio-video frequency processing method that Fig. 6 provides for the embodiment of the invention five;
Fig. 7 is the FB(flow block) that multichannel audio-video frequency is handled in the embodiment of the invention five;
The structural representation of the multichannel audio-video frequency transmitting device that Fig. 8 provides for the embodiment of the invention six;
The structural representation of the multichannel audio-video frequency transmitting device that Fig. 9 provides for the embodiment of the invention seven.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one
The flow chart of the multichannel audio-video frequency transmission method that Fig. 1 provides for the embodiment of the invention one.During the method for present embodiment is applicable to that the broadcast of multichannel audio-video frequency code stream is used, be particularly useful for the multichannel audio-video frequency code stream need be by Network Transmission the time, send distolateral performed method, specifically can carry out following steps by audio frequency and video:
The mode that above-mentioned steps middle pitch video sending end is obtained audio-video code stream can be directly to obtain from camera head, also can be to receive audio-video code stream, perhaps transfers audio-video code stream from data blocks stored, and the form of specifically obtaining is not limit.
In step 120, the every road audio-video code stream correspondence that is incorporated in the composite bit stream is provided with the code stream identification that is used to identify affiliated audio-video code stream.Because audio-video code stream may be provided with a plurality of processing links as required before by Network Transmission, for example shooting collections, digital-to-analogue (AD) conversion, coding, buffer memory and message encapsulation link etc. are so the merging processing links can be one of them or several links.Code stream identification corresponding to the audio-video code stream setting of every road can be included in the composite bit stream, also can be independent of composite bit stream, can play to distinguish that each road audio-video code stream gets final product in the composite bit stream.
In the above-mentioned steps, the applied network transmission protocol of transmission composite bit stream can be existing variety of protocol.
The technical scheme of present embodiment is by being integrated into the multichannel audio-video frequency code stream at least one road composite bit stream, particularly preferably be integrated into one road composite bit stream, when transmitting by network, avoided lack of uniformity that network channel is taken, some channel busy can not appear and the situation of some passage free time, thereby can optimize the use of Internet resources, improve data transmission efficiency.The technical scheme of present embodiment can also the elevator system performance, when being integrated into a small amount of composite bit stream, having reduced system and call the load of handling resource and increasing between the multichannel audio-video frequency code stream.Simultaneously, this technical scheme is owing to adopt less or even composite bit stream transmission tone video code flow, thereby makes Network Transmission synchronous, solves the multichannel audio-video frequency problem of the synchronous output during transmission process alone.
Embodiment two
The flow chart of the multichannel audio-video frequency transmission method that Fig. 2 provides for the embodiment of the invention two.Present embodiment can be based on the foregoing description, the operation that each road audio-video code stream is incorporated in the composite bit stream of at least one road is optimized, specifically can be that the audio frequency and video transmitting terminal is arranged on the code stream identification correspondence in each unit data piece of each road audio-video code stream, and the merging of constituent parts data block is become at least one road composite bit stream.
Usually, audio-video code stream is made up of a plurality of unit data pieces, and according to the difference of processing links, the form of expression of the unit data piece of each processing links has difference.Present embodiment can add code stream identification in each unit data piece, thereby can split each unit data piece at the audio frequency and video receiving terminal, then manages link more throughout and makes up.Present embodiment provides a preferred version, specifically be to select message encapsulation link as merging processing links, then the handled unit data piece of message encapsulation link is a data message, then the code stream identification correspondence is arranged in each unit data piece of each road audio-video code stream, and the constituent parts data block merged becomes at least one road composite bit stream and can comprise the steps:
Step 220, audio frequency and video transmitting terminal are encapsulated in each data message in the compound message flow at least one road.
In actual applications, each data message typically all comprises a frame head, wherein comprises the information of some fields.The technical scheme of present embodiment is promptly utilized this point, takies a field in the frame head of data message, carries the channel number that can identify each road audio-video code stream.For some audio frequency and video transmitting terminals, its usually may be corresponding set the audio-video code stream harvester of quantity, can receive the audio-video code stream of several passages, therefore can pass through each road audio-video code stream of the unique differentiation of channel number.Perhaps, at common audio frequency and video transmitting terminal, also can identify each road audio-video code stream with modes such as order unique number.
Fig. 3 A carries out the schematic diagram that data message merges in the embodiment of the invention two, as shown in Figure 3A, suppose to have four tunnel audio-video code stream, forms the data message of frame code stream form after it is encoded by encoder.Carrying out message when encapsulation, can as shown in Figure 3A, be that the data message of four tunnel audio-video code stream adds after the frame head separately for data message adds the frame head file usually, has formed the composite bit stream of an integral body in buffer memory.Each data message in the composite bit stream can be described as code stream again, and first via audio-video code stream comprises " code stream 1, code stream 1 ', code stream 1 " as shown in Figure 3A ... ", the second tunnel, Third Road and the similar code stream that comprises separately of the four tunnel audio-video code stream.Compound one road composite bit stream that becomes of four tunnel audio-video code stream, and each road audio-video code stream putting in order in composite bit stream do not limit, and can merge according to the sequencing that obtains.
Each data message includes frame head and code stream frame data, and frame head mainly is conveniently to parse each code stream frame from composite bit stream, and its structure preferably can comprise frame type sign, frame length and private information etc. shown in Fig. 3 B.Wherein the frame type sign not only is used for representing the original position of a frame, but also represents the concrete type of this frame.Frame length can follow the length of effective code stream frame data of back for representative closely.Private information can carry warning message in supervisory control system, in fields such as set-top box, can carry programme information etc.The byte that channel number can be used as certain field also can be used as the independent byte in the frame head.
For example, channel number can be used as a byte in the frame type sign, and shown in Fig. 3 C, the frame type sign comprises four bytes, is respectively audio/video frames sign, frame type, concrete frame format and channel number.Frame type as frame of video is designated " Vxxx ".First byte " V " expression frame of video sign; Second byte representation video type got " H " and represented the H264 video, and " M " represents the MPEG4 video; The 3rd the concrete form of byte representation video got " 0 " and represented video I frame, and " 1 " represents video P frame; The 4th byte representation channel number, value are represented the 0th passage for " 0 ", are 1 expression the 1st passage.Such as the H 264 video I frames of the 15th passage, then be " VH 0E ".The frame type of audio frame is designated " Axxx ".First byte " A " expression audio frame sign; Second byte representation audio types got " A " expression AMR, gets " G " expression G series audio frequency, gets " P " expression PCM, also can carry out corresponding expansion according to application; The 3rd the concrete frame format of byte representation, it is with second byte concrete audio format of representative of arranging in pairs or groups, and it gets " 6 " expression G 726 audio frequency, gets " A " expression adpcm audio; The 4th byte representation channel number.Such as the 10th channel audio form is G711, then is " AG1A ".
Certainly, in the frame head content of placing is not limited, provide the sign of distinguishing frame boundaries, the information that frame type is provided, use for terminal parses but the overall principle is requirement.
The technical scheme of present embodiment has utilized existing audio-video code stream to carry out the processing links of message encapsulation before Network Transmission, in frame head, carry code stream identification and distinguish each road audio-video code stream, both realized the effect that code stream merges, reduced change again as far as possible, be adapted to apply existing code flow processing method.
On the basis of the various embodiments described above, audio-video code stream can comprise a plurality of required links in the processing procedure of transmitting terminal, and the operation of typically obtaining the multichannel audio-video frequency code stream in the audio frequency and video transmitting terminal respectively can comprise: gather the multichannel audio-video frequency code stream from each camera head respectively; The multichannel audio-video frequency code stream that collects is carried out digital-to-analogue conversion and coding respectively, to obtain the multichannel audio-video frequency code stream.Be not limited to this in the practical application.
The multichannel audio-video frequency transmission method that the embodiment of the invention provided has many advantages, has for example optimized network transmission resource and system call resource etc.In addition, can carry out other processing to each road audio-video code stream and composite bit stream.For example after the Jiang Gelu audio-video code stream is incorporated in the composite bit stream of at least one road, can also store each road audio-video code stream respectively, and/or the storage of complex code stream.Promptly be equivalent to audio frequency and video are carried out the video record operation.Separately the audio-video code stream of record can independent play-out, and the composite bit stream of storage and uniform also can split broadcast subsequently in resolver.
Embodiment three
The flow chart of the multichannel audio-video frequency processing method that Fig. 4 provides for the embodiment of the invention three, present embodiment preferably cooperates execution with multichannel audio-video frequency transmission method provided by the invention, and specifically can be received by audio frequency and video and bring in execution, and this method comprises the steps:
The technical scheme of present embodiment is carried out deconsolidation process to the composite bit stream through Network Transmission, specifically be to split according to code stream identification, code stream identification can be carried in the composite bit stream, also can be independent of the composite bit stream transmission, as long as each road audio-video code stream can be split parsing.
The technical scheme of present embodiment is by being integrated into the multichannel audio-video frequency code stream of at least one road composite bit stream, when transmitting by network, avoided lack of uniformity that network channel is taken, some channel busy can not appear and the situation of some passage free time, thereby can optimize the use of Internet resources, improve data transmission efficiency.The technical scheme of present embodiment can also the elevator system performance, when handling a small amount of even a composite bit stream, has reduced system and call the load of handling resource and increasing between the multichannel audio-video frequency code stream.Simultaneously, this technical scheme is owing to adopt less or even composite bit stream transmission tone video code flow, thereby makes Network Transmission synchronous, solves the multichannel audio-video frequency problem of the synchronous output during transmission process alone.
Embodiment four
The flow chart of the multichannel audio-video frequency processing method that Fig. 5 provides for the embodiment of the invention four, present embodiment has specifically been optimized the operation that splits composite bit stream, according to the code stream identification that is provided with corresponding to every road audio-video code stream, composite bit stream is split the operation that becomes each road audio-video code stream can carry out following steps: from composite bit stream, extract the constituent parts data block; According to the code stream identification that carries in each unit data piece, the unit data piece merging of extracting is become each road audio-video code stream corresponding to the setting of every road audio-video code stream.
Present embodiment can add code stream identification in each unit data piece, thereby the audio frequency and video receiving terminal can split each unit data piece, then carries out the combination of each road audio-video code stream again in the subsequent treatment link.Present embodiment provides a preferred version, specifically be to select the packet parsing link as the deconsolidation process link, then the handled unit data piece of packet parsing link is a data message, then according to the code stream identification corresponding to the setting of every road audio-video code stream that carries in each unit data piece, the unit data piece merging of extracting is become each road audio-video code stream can be comprised the steps:
In actual applications, each data message typically all comprises a frame head, wherein comprises the information of some fields.The technical scheme of present embodiment is promptly utilized this point, takies a field in the frame head of data message, carries the channel number that can identify each road audio-video code stream.Certainly, can identify the code stream identification of distinguishing each road audio-video code stream and be not limited to channel number.
The technical scheme of present embodiment has utilized existing audio-video code stream to carry out packet parsing after Network Transmission, it is the processing links of message decapsulation, distinguish each road audio-video code stream with the code stream identification that carries in the frame head, both realized the effect that code stream splits, reduced change again as far as possible, be adapted to apply existing code flow processing method.
On the basis of the various embodiments described above, the operation that performed each the road audio-video code stream to after splitting of receiving terminal is handled respectively can be refined as: each the road audio-video code stream after splitting is decoded respectively and caching process; And each road audio-video code stream of caching process carried out picture splicing, in same display, play.Certainly the processing links in the practical application is not limited to this.
The multichannel audio-video frequency processing method that various embodiments of the present invention provided can either be handled each road audio-video code stream independently, also can unify composite bit stream is handled.For example, host-host protocol Network Based receives after at least one road composite bit stream of audio frequency and video transmitting terminal transmission, can also store the composite bit stream that receives.Be equivalent to composite bit stream is carried out video record, when needs are play, split again and get final product.
Embodiment five
The flow chart of the multichannel audio-video frequency processing method that Fig. 6 provides for the embodiment of the invention five, present embodiment specifically provides the entire process process of multichannel audio-video frequency code stream, as shown in Figure 7, be the FB(flow block) that multichannel audio-video frequency in the embodiment of the invention five is handled, the multichannel audio-video frequency processing method comprises the steps: typically
Each camera head in step 610, the audio frequency and video transmitting terminal is gathered the multichannel audio-video frequency code stream respectively;
Camera head can be camera as shown in Figure 7, also can broadly be interpreted as storing the video disc of audio-video code stream, and perhaps other can provide the device of audio-video code stream.
In the above-mentioned steps 620, specifically can adopt a plurality of AD converter that each road audio-video code stream is carried out digital-to-analogue conversion, then adopt a plurality of encoders respectively each road audio-video code stream to be carried out, form the frame code stream of forming by data message.
Buffer unit shown in Figure 7 can be finished the operation of above-mentioned steps 630, not only adds frame head but also carry out buffer memory, and reality has just formed tactic composite bit stream in buffer memory.The data message is carried out buffer memory can be stored with the formation of first-in first-out according to the priority that receives.
Step 640, audio frequency and video transmitting terminal extract each data message from buffer memory, be encapsulated in the compound message flow at least one road, preferably are encapsulated in the one tunnel compound message flow;
The channel number that carries in each data message frame head in step 660, the audio frequency and video receiving terminal identification composite bit stream corresponding to the setting of every road audio-video code stream;
In above-mentioned steps 660 and the step 670, specifically the data message that network can be received carries out buffer memory, then carries out the packet parsing operation in resolution unit.When resolving composite bit stream, at first byte-by-byte searches the frame type sign earlier, again according to the frame data length of back, read the frame data of back, according to the frame information that parses, such as channel number, the concrete form of audio frequency and video etc., the decoder that this code stream can be sent into respective channel carries out decoding and displaying.
In the above-mentioned steps 680, can obtain the multichannel audio-video frequency code stream respectively from resolution unit, independently decode, then buffer memory by a plurality of decoding units.Can the time of implementation Synchronization Control in the process of buffer memory, so that the picture retention time of follow-up play is synchronous.
The technical scheme of present embodiment, the technical scheme that in fact provides a plurality of codecs, single buffer memory to splice, this technical scheme is applicable to general single channel video and audio coding technology more.The multiway images sequence is respectively by encoder generation video code flow separately, and the multichannel code stream adds that the special identifier of passage is sent in the public buffer memory afterwards separately, forms the composite bit stream of multichannel.The video recording storage can also can be recorded a video based on the code stream that single channel encodes out based on this composite bit stream video recording.Network sends and handles based on this composite bit stream, and the network terminal receives data and sends into buffer memory, parses each road video code flow by resolution unit, sends into decoder separately respectively, solves image sequence; Just send display to show after the picture splicing.
Embodiment six
The structural representation of the multichannel audio-video frequency transmitting device that Fig. 8 provides for the embodiment of the invention six, this device specifically can be integrated in the audio frequency and video transmitting terminal, can comprise that specifically code stream acquisition module 810, code stream merge module 820 and code stream transport module 830.Wherein, code stream acquisition module 810 is used for obtaining respectively the multichannel audio-video frequency code stream; Code stream merges module 820 and is used for merging processing links each road audio-video code stream being incorporated in the composite bit stream of at least one road, and wherein, the every road audio-video code stream correspondence that is incorporated in the composite bit stream is provided with the code stream identification that is used to identify affiliated audio-video code stream; Code stream transport module 830 is used for host-host protocol Network Based and transmits described composite bit stream to the audio frequency and video receiving terminal, and composite bit stream being split according to code stream identification with indication audio frequency and video receiving terminal becomes each road audio-video code stream.
Preferably select message encapsulation link as merging processing links, then code stream merging module 820 can comprise: frame head adding device 821 and message encapsulation unit 822.Wherein, frame head adding device 821 is used for the channel number correspondence of each road audio-video code stream is arranged on the frame head of each data message of each road audio-video code stream; Message encapsulation unit 822 is used for each data message is encapsulated in the compound message flow at least one road.
The technical scheme of present embodiment can be carried out any embodiment of the present invention the multichannel audio-video frequency transmission method is provided, and has a corresponding functional modules, by the multichannel audio-video frequency code stream being integrated at least one road composite bit stream, particularly preferably be integrated into one road composite bit stream, when transmitting by network, avoided lack of uniformity that network channel is taken, some channel busy can not appear and the situation of some passage free time, thereby can optimize the use of Internet resources, improve data transmission efficiency.The technical scheme of present embodiment can also the elevator system performance, when being integrated into a small amount of composite bit stream, having reduced system and call the load of handling resource and increasing between the multichannel audio-video frequency code stream.
Embodiment seven
The structural representation of the multichannel audio-video frequency transmitting device that Fig. 9 provides for the embodiment of the invention seven, this device specifically can be integrated in the audio frequency and video receiving terminal, can comprise that specifically code stream receiver module 910, code stream split module 920 and code stream processing module 930.Wherein, code stream receiver module 910 is used at least one road composite bit stream that host-host protocol Network Based receives the transmission of audio frequency and video transmitting terminal; Code stream splits module 920 and is used in the deconsolidation process link, according to the code stream identification that is provided with corresponding to every road audio-video code stream, the composite bit stream fractionation is become each road audio-video code stream; Code stream processing module 930 is used for each the road audio-video code stream after splitting is handled respectively.
Preferably select the packet parsing link as the deconsolidation process link, then code stream fractionation module 920 preferably includes: frame head recognition unit 921 and code stream merge cells 922.Wherein, frame head recognition unit 921 is used for discerning the channel number corresponding to the setting of every road audio-video code stream that each data message frame head carries; Code stream merge cells 922 is used for according to described channel number the data message merging of extracting being become each road audio-video code stream.
The technical scheme of present embodiment can be carried out any embodiment of the present invention the multichannel audio-video frequency processing method is provided, and has corresponding functional modules.The technical scheme of present embodiment is by being integrated into the multichannel audio-video frequency code stream of at least one road composite bit stream, when transmitting by network, avoided lack of uniformity that network channel is taken, some channel busy can not appear and the situation of some passage free time, thereby can optimize the use of Internet resources, improve data transmission efficiency.The technical scheme of present embodiment can also the elevator system performance, when handling a small amount of even a composite bit stream, has reduced system and call the load of handling resource and increasing between the multichannel audio-video frequency code stream.
The embodiment of the invention also provides a kind of multichannel audio-video frequency treatment system, comprises multichannel audio-video frequency transmitting device and multichannel audio-video frequency processing unit that any embodiment of the present invention provides.
The technical scheme of various embodiments of the present invention has solved the problem of remote playing multichannel audio-video frequency, by the multichannel audio-video frequency code stream being integrated at least one road composite bit stream, particularly preferably be integrated into one road composite bit stream, thereby has following advantage: on the one hand, the technical scheme of the embodiment of the invention has reduced the quantity of audio-video code stream by integration, therefore by the Network Transmission code stream time, need not independently to take network channel and some channel busy phenomenon of some passage free time occurs, thereby can utilize Internet resources fully, improve efficiency of transmission; On the other hand, the processing links of audio-video code stream is more, for example digital-to-analogue conversion, encoding and decoding etc., when audio-video code stream reaches tens the tunnel even tens the tunnel, the technical scheme of the embodiment of the invention can not increase the load that system manages throughout to be increased when resource is handled in link scheduling too much, can easier realization handles the balanced use of resource; Again on the one hand, the technical scheme of the embodiment of the invention is by unified transmission composite bit stream, and the equalization data transmission rate of can trying one's best reduces the data that are transferred to after the data that are transferred to are earlier waited for and the phenomenon of playout-delay.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (15)
1. a multichannel audio-video frequency transmission method is characterized in that, comprising:
Obtain the multichannel audio-video frequency code stream respectively;
Merging processing links, each road audio-video code stream is incorporated in the composite bit stream of at least one road, wherein, the every road audio-video code stream correspondence that is incorporated in the composite bit stream is provided with the code stream identification that is used to identify affiliated audio-video code stream;
Host-host protocol Network Based transmits described composite bit stream to the audio frequency and video receiving terminal, becomes each road audio-video code stream to indicate described audio frequency and video receiving terminal according to described code stream identification described composite bit stream to be split.
2. multichannel audio-video frequency transmission method according to claim 1 is characterized in that, each road audio-video code stream is incorporated in the composite bit stream of at least one road comprise:
Described code stream identification correspondence is arranged in each unit data piece of each road audio-video code stream, and the merging of constituent parts data block is become at least one road composite bit stream.
3. multichannel audio-video frequency transmission method according to claim 2, it is characterized in that, described merging processing links is a message encapsulation link, then described code stream identification correspondence is arranged in each unit data piece of each road audio-video code stream, and the constituent parts data block merged becomes at least one road composite bit stream and comprise:
The channel number correspondence of each road audio-video code stream is arranged in the frame head of each data message of each road audio-video code stream;
Each data message is encapsulated in the compound message flow at least one road.
4. according to the arbitrary described multichannel audio-video frequency transmission method of claim 1-3, it is characterized in that, obtain the multichannel audio-video frequency code stream respectively and comprise:
From each camera head, gather the multichannel audio-video frequency code stream respectively;
The multichannel audio-video frequency code stream that collects is carried out digital-to-analogue conversion and coding respectively, to obtain the multichannel audio-video frequency code stream.
5. according to the arbitrary described multichannel audio-video frequency transmission method of claim 1-3, it is characterized in that, after the Jiang Gelu audio-video code stream is incorporated in the composite bit stream of at least one road, also comprise: store described each road audio-video code stream respectively, and/or store described composite bit stream.
6. a multichannel audio-video frequency processing method is characterized in that, comprising:
Host-host protocol Network Based receives at least one road composite bit stream of audio frequency and video transmitting terminal transmission;
In the deconsolidation process link,, described composite bit stream fractionation is become each road audio-video code stream according to the code stream identification that is provided with corresponding to every road audio-video code stream;
Each road audio-video code stream after splitting is handled respectively.
7. multichannel audio-video frequency processing method according to claim 6 is characterized in that, according to the code stream identification that is provided with corresponding to every road audio-video code stream, described composite bit stream fractionation is become each road audio-video code stream comprise:
From described composite bit stream, extract the constituent parts data block;
According to the code stream identification that carries in each unit data piece, the unit data piece merging of extracting is become each road audio-video code stream corresponding to the setting of every road audio-video code stream.
8. multichannel audio-video frequency processing method according to claim 7, it is characterized in that, described deconsolidation process link is the packet parsing link, then, the unit data piece merging of extracting is become each road audio-video code stream comprises according to the code stream identification that carries in each unit data piece corresponding to the setting of every road audio-video code stream:
Discern the channel number that carries in each data message frame head corresponding to the setting of every road audio-video code stream;
According to described channel number the data message merging of extracting is become each road audio-video code stream.
9. according to the arbitrary described multichannel audio-video frequency processing method of claim 6-8, it is characterized in that, each the road audio-video code stream after splitting is handled respectively comprised:
Each road audio-video code stream after splitting is decoded respectively and caching process;
And each road audio-video code stream of caching process carried out picture splicing, in same display, play.
10. according to the arbitrary described multichannel audio-video frequency processing method of claim 6-8, it is characterized in that host-host protocol Network Based receives after at least one road composite bit stream of audio frequency and video transmitting terminal transmission, also comprises:
The described composite bit stream that receives is stored.
11. a multichannel audio-video frequency transmitting device is characterized in that, comprising:
The code stream acquisition module is used for obtaining respectively the multichannel audio-video frequency code stream;
Code stream merges module, is used for merging processing links each road audio-video code stream being incorporated in the composite bit stream of at least one road, and wherein, the every road audio-video code stream correspondence that is incorporated in the composite bit stream is provided with the code stream identification that is used to identify affiliated audio-video code stream;
The code stream transport module is used for host-host protocol Network Based and transmits described composite bit stream to the audio frequency and video receiving terminal, becomes each road audio-video code stream to indicate described audio frequency and video receiving terminal according to described code stream identification described composite bit stream to be split.
12. multichannel audio-video frequency transmitting device according to claim 11 is characterized in that, described merging processing links is a message encapsulation link, and then described code stream merges module and comprises:
The frame head adding device is used for the channel number correspondence of each road audio-video code stream is arranged on the frame head of each data message of each road audio-video code stream;
The message encapsulation unit is used for each data message is encapsulated in the compound message flow at least one road.
13. a multichannel audio-video frequency processing unit is characterized in that, comprising:
The code stream receiver module is used at least one road composite bit stream that host-host protocol Network Based receives the transmission of audio frequency and video transmitting terminal;
Code stream splits module, is used in the deconsolidation process link, according to the code stream identification that is provided with corresponding to every road audio-video code stream, described composite bit stream fractionation is become each road audio-video code stream;
The code stream processing module is used for each the road audio-video code stream after splitting is handled respectively.
14. multichannel audio-video frequency processing unit according to claim 13 is characterized in that, described deconsolidation process link is the packet parsing link, and then described code stream splits module and comprises:
The frame head recognition unit is used for discerning the channel number corresponding to the setting of every road audio-video code stream that each data message frame head carries;
The code stream merge cells is used for according to described channel number the data message merging of extracting being become each road audio-video code stream.
15. a multichannel audio-video frequency treatment system is characterized in that, comprising: claim 11 or 12 described multichannel audio-video frequency transmitting devices and claim 13 or 14 described multichannel audio-video frequency processing unit.
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| PCT/CN2011/077259 WO2012106898A1 (en) | 2011-07-18 | 2011-07-18 | Method, device and system for transmitting and processing multi-channel audio-video |
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| CN102301730A true CN102301730A (en) | 2011-12-28 |
| CN102301730B CN102301730B (en) | 2014-02-19 |
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| CN201180001226.8A Active CN102301730B (en) | 2011-07-18 | 2011-07-18 | Method, device and system for transmitting and processing multichannel AV |
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| CN115802074A (en) * | 2022-11-10 | 2023-03-14 | 中国联合网络通信集团有限公司 | Multi-channel video transmission method, device, equipment and medium |
| CN115802074B (en) * | 2022-11-10 | 2024-03-29 | 中国联合网络通信集团有限公司 | Multipath video transmission method, device, equipment and medium |
| CN116886912A (en) * | 2022-12-06 | 2023-10-13 | 广州开得联软件技术有限公司 | Multipath video coding method, device, equipment and storage medium |
| CN116886912B (en) * | 2022-12-06 | 2024-02-13 | 广州开得联软件技术有限公司 | Multipath video coding method, device, equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102301730B (en) | 2014-02-19 |
| WO2012106898A1 (en) | 2012-08-16 |
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