CN101895737A - Multimedia decoding method and device as well as video monitoring method and system - Google Patents
Multimedia decoding method and device as well as video monitoring method and system Download PDFInfo
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Abstract
The invention provides multimedia decoding method and device as well as video monitoring method and system. The decoding method comprises the following steps of: A, obtaining network transmission multimedia code stream by a multimedia decoding device; B, converting the obtained network transmission multimedia code stream into original basic code stream by the multimedia decoding device; and C, decoding the original basic code stream by the multimedia decoding device. By using the multimedia decoding method, code stream adaptive decoding with a plurality of formats can be realized, and because only ES stream is decoded, the complexity of processing of a decoding module such as a decoding chip is effectively decreased, and the decoding performance of the decoding module is improved.
Description
Technical field
The present invention relates to the processing of Network Transmission multimedia code stream, particularly relate to a kind of multimedia decoding method and device, video frequency monitoring method and system.
Background technology
Along with the develop rapidly of information networking, with its networking flexibly, technical advantage such as management and overlength distance transmission easily, expand its application based on the digital supervision technology of network gradually, the trend that replaces the tradition monitoring is arranged greatly.Monitoring technique has quickened the extensive use of multimedia technology at monitoring trade again towards networking, the continuous development of digitlization.Multimedia comprises literal, sound, image, figure etc., has characteristics such as contain much information, ability to express is strong, so it replaces single information pattern to become irresistible trend.
Under the promotion of the market demand, the product of the up-to-date support high definition program source that many set-top box manufacturer releases successively.In order to adapt to wireless 3G/4G networks development, supported the video monitoring front-end manufacturer of transport stream (TS) to release the product of new support internet stream media alliance (ISM A) code stream especially in the past.And the fixed network network bandwidth requirement different with wireless network be at different applied environments, and encoder uses different resolution, different audio compression forms.Therefore, in existing digital supervision, just occur inevitably: multiple audio format such as G series voice, multiple network packing pattern such as ISMA and two kinds of patterns of TS, the phenomenon that reaches various video compressed format and deposit.These forms respectively have superiority, and not enough place is respectively arranged again, are used in different field of video monitoring respectively.
How multimedia decoder such as video monitoring decoder realize the adaptive decoding of multiple audio frequency and video form as the end product of audio/video decoding in the video monitoring system, and how compatible different watch-dog becomes the problem that decoder at first will solve.
Summary of the invention
The purpose of this invention is to provide a kind of multimedia decoding method and device, video frequency monitoring method and system, to solve the technical problem that prior art can't realize multi-format compatible decoding.
To achieve these goals, the invention provides a kind of multimedia decoding method, wherein, comprise the steps:
Steps A, multimedia decoding apparatus are obtained the Network Transmission multimedia code stream;
Step B, described multimedia decoding apparatus is converted to original elementary stream with the described Network Transmission multimedia code stream that obtains;
Step C, described multimedia decoding apparatus is decoded to described original elementary stream.
Preferably, described multimedia decoding method, wherein,
In the described steps A, described Network Transmission multimedia code stream transfers to described multimedia decoding apparatus in the network packet mode,
Described step B comprises:
Described multimedia decoding apparatus is determined the packing pattern of network packet in the described Network Transmission multimedia code stream according to the packet header of network packet in the described Network Transmission multimedia code stream;
Described multimedia decoding apparatus calls and the described corresponding modular converter of determining of packing pattern, and described Network Transmission multimedia code stream is converted to original elementary stream.
Preferably, described multimedia decoding method, wherein, described packing pattern comprises: transport stream mode and internet stream media alliance pattern.
Preferably, described multimedia decoding method, wherein, after obtaining described Network Transmission multimedia code stream, with described Network Transmission multimedia code stream, be converted to original elementary stream before, also comprise:
Timestamp and bag serial number information according to each network packet in the described Network Transmission multimedia code stream sort to each network packet in the described Network Transmission multimedia code stream.
Preferably, described multimedia decoding method, wherein,
In the described steps A, described multimedia decoding apparatus gets access to the different Network Transmission of the two-way at least multimedia code stream of packing pattern simultaneously;
Among the described step B, described multimedia decoding apparatus is determined in the described Network Transmission of the two-way at least multimedia code stream, the packing pattern of network packet in each road network network transmitting multimedia code stream, and the corresponding modular converter of packing pattern that calls and determine is converted to original elementary stream with described each road network network transmitting multimedia code stream.
On the other hand, provide a kind of multimedia decoding apparatus, wherein, comprising:
Acquisition module is used to obtain the Network Transmission multimedia code stream;
Processing module is used for the described Network Transmission multimedia code stream that obtains is converted to original elementary stream;
Decoder module is decoded to described original elementary stream.
Preferably, described multimedia decoding apparatus, wherein, described processing module comprises:
At least two modular converters, each described modular converter is corresponding with a kind of packing pattern of network packet, is used for the pack Network Transmission multimedia code stream of pattern of correspondence is converted to original elementary stream;
Determination module is used for the packet header according to described Network Transmission multimedia code stream network packet, determines the packing pattern of network packet in the described Network Transmission multimedia code stream;
Calling module is used to call the corresponding modular converter of packing pattern with described network packet.
Preferably, described multimedia decoding apparatus, wherein, described packing pattern comprises: transport stream mode and internet stream media alliance pattern.
Preferably, described multimedia decoding apparatus wherein, also comprises:
Order module, before being used for being converted to original elementary stream, each network packet in the described Network Transmission multimedia code stream is sorted according to the timestamp of each network packet in the described Network Transmission multimedia code stream and the information of bag sequence number after obtaining described Network Transmission multimedia code stream, with described Network Transmission multimedia code stream.
Another aspect provides a kind of video frequency monitoring method, wherein, comprises the steps:
Step B1, described multimedia decoding apparatus is converted to original elementary stream with the described Network Transmission multimedia code stream that obtains;
Step C1, described multimedia decoding apparatus is decoded to described original elementary stream, and exports decoded multimedia messages to monitor terminal device, to play on monitor terminal device.
Preferably, described video frequency monitoring method, wherein,
In the described steps A 1, described Network Transmission multimedia code stream transfers to described multimedia decoding apparatus in the network packet mode;
Described step B1 comprises:
Described multimedia decoding apparatus is determined the packing pattern of network packet in the described Network Transmission multimedia code stream according to the packet header of network packet in the described Network Transmission multimedia code stream;
Described multimedia decoding apparatus calls and the described corresponding modular converter of determining of packing pattern, and described Network Transmission multimedia code stream is converted to original elementary stream.
Another aspect provides a kind of video monitoring system, wherein, comprising:
The front monitoring front-end code device is exported after the front end coded multimedia information that is used for collecting becomes the Network Transmission multimedia code stream;
Multimedia decoding apparatus comprises:
Acquisition module is used to obtain the Network Transmission multimedia code stream of described front monitoring front-end code device output;
Processing module is used for the described Network Transmission multimedia code stream that obtains is converted to original elementary stream;
Decoder module is decoded to described original elementary stream, and the multimedia messages behind the output decoder;
Monitor terminal device is used to receive the multimedia messages of described multimedia decoding apparatus output, and plays.
Preferably, described video monitoring system, wherein, described processing module comprises:
At least two modular converters, each described modular converter is corresponding with a kind of packing pattern of network packet, is used for the pack Network Transmission multimedia code stream of pattern of correspondence is converted to original elementary stream;
Determination module is used for the packet header according to described Network Transmission multimedia code stream network packet, determines the packing pattern of network packet in the described Network Transmission multimedia code stream;
Calling module is used to call the corresponding modular converter of packing pattern with described network packet.
Technique effect of the present invention is:
The present invention is by directly being decoded into original elementary stream (ES to the Network Transmission multimedia code stream, Elementary Stream) after, decode again, can realize the adaptive decoding of multiple form code stream, and owing to decoder module only needs decode to ES stream, effectively reduce the processing complexity of decoder module such as decoding chip, improved the decoding performance of decoder module.
Description of drawings
Fig. 1 is the schematic flow sheet of the multimedia decoding method of the embodiment of the invention;
Fig. 2 is the structural representation of the multimedia decoding apparatus of the embodiment of the invention;
Fig. 3 is the result schematic diagram of the video monitoring system of the embodiment of the invention;
Fig. 4 is the schematic flow sheet of the video frequency monitoring method of the embodiment of the invention;
Fig. 5 is the operation principle schematic diagram of the video monitoring system of another embodiment of the present invention;
Fig. 6 carries out the schematic flow sheet of video monitoring for the video monitoring system of another embodiment of the present invention;
Fig. 7 is in the multimedia decoding method of the embodiment of the invention, the operation principle schematic diagram of modular converter.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 1 is the schematic flow sheet of the multimedia decoding method of the embodiment of the invention.As Fig. 1, the multimedia decoding method of this embodiment comprises the steps:
In this example, preferably, above-mentioned Network Transmission multimedia code stream transfers to multimedia decoding apparatus in the mode of network packet, exemplarily, adopt RTP (RTP, Real-Time Transport Protocol) packing manner sends the Network Transmission multimedia code stream, exemplarily, the packing pattern of network packet comprises in the multimedia code stream: transport stream (TS, Transport Stream) pattern and internet stream media alliance pattern (ISMA, International Snowmobile Manufacturers Association) pattern.Exemplarily, concrete host-host protocol can adopt transmission control protocol (TCP, Transmission Control Protocol), User Datagram Protoco (UDP) (UDP, User Datagram Protocol) and multicast transmission layer protocol.
Above-mentioned steps 102 comprises: multimedia decoding apparatus is determined the packing pattern of network packet in the described Network Transmission multimedia code stream according to the packet header of network packet in the described Network Transmission multimedia code stream;
Described multimedia decoding apparatus calls and the described corresponding modular converter of determining of packing pattern, and described Network Transmission multimedia code stream is converted to original elementary stream.Preferably, multimedia decoding apparatus just begins to analyze the packet header of each RTP bag after receiving first RTP bag, obtain the loadtype of RTP bag, and and then the packing pattern of definite network packet.
The technical scheme of the embodiment of the invention, by being provided with and calling and the different corresponding modular converters of packing pattern, can realize the pack Network Transmission multimedia code stream of pattern of difference is converted to original basic stream, can realize the adaptive decoding of the code stream of multiple packing pattern like this, and owing to decoder module only needs decode to ES stream, and need not again to realize as the demultiplexing of TS code stream or ISMA code stream or unpack work by decoder module, effectively reduce the processing complexity of decoder module such as decoding chip, improved the decoding performance of decoder module.
Because out of order, shake that the bag that different network environments may cause decoding device to receive takes place particularly uses the RTP of UDP transmission to wrap, need carry out operations such as out of order rearrangement to each RTP bag, to improve service quality.Because sequencer procedure requires information such as each band timestamp and bag sequence number, therefore need before unpacking, to finish ordering.Preferably, in the coding/decoding method of the embodiment of the invention, be converted to original elementary stream after obtaining described Network Transmission multimedia code stream, with described Network Transmission multimedia code stream before, also comprise: timestamp and bag serial number information according to each network packet in the described Network Transmission multimedia code stream sort to each network packet in the described Network Transmission multimedia code stream.After the disorderly possible network packet of order is sorted, can steadily send like this by the code stream that the network packet after the ordering constitutes.
In other embodiments of the invention, in the step 101, multimedia decoding apparatus gets access to the different Network Transmission of the two-way at least multimedia code stream of packing pattern simultaneously; In the step 102, described multimedia decoding apparatus is determined in the described Network Transmission of the two-way at least multimedia code stream, the packing pattern of network packet in each road network network transmitting multimedia code stream, and the corresponding modular converter of packing pattern that calls and determine is converted to original elementary stream with described each road network network transmitting multimedia code stream.In this example, at least two modular converters of setting of correspondence in the multimedia decoding apparatus, each modular converter is corresponding with a kind of packing pattern of network packet, and the Network Transmission multimedia code stream that is used for packing with correspondence packing pattern is converted to original elementary stream.Illustrate, multimedia decoding apparatus can comprise: first modular converter is the TS demultiplexing module, and the TS code stream that is used for packing in the TS mode is converted to the ES code stream; Second modular converter is the ISMA parse module, is used for the ISMA code stream with the ISMA packing is converted to the ES code stream.
In the embodiments of the invention, can only carry out decoding processing of the present invention to a road network network transmitting multimedia code stream, also can carry out decoding processing of the present invention at multi-channel network transmitting multimedia code stream simultaneously, the multimedia code stream of different packing patterns calls different modular converters respectively and is converted to the ES code stream, again the ES code stream of changing out is decoded, thereby by the packing pattern corresponding modular converter of setting with the head end encoder employing of different manufacturers, can decode to the head end encoder of a plurality of different manufacturers simultaneously, the compatibility and the decoding performance of the device of raising the price have been increased greatly, adapt to following 3G/4G network development, the occupation rate of market that improves product is had very big facilitation.Pack according to general standard agreement because existing producer is many, as TS or ISMA, then the setting of carrying out modular converter according to existing general standard agreement in multimedia decoding apparatus gets final product.And when the packing pattern that the new agreement of follow-up appearance or new need are handled, can pass through card format, constantly increase the type of decoding, have autgmentability preferably.
The embodiment of the invention also provides a kind of multimedia decoding apparatus, and as Fig. 2, this multimedia decoding apparatus comprises:
Acquisition module is used to obtain the Network Transmission multimedia code stream;
Processing module is used for the described Network Transmission multimedia code stream that obtains is converted to original elementary stream;
Decoder module is decoded to described original elementary stream.
Preferably, in the multimedia decoding apparatus of this embodiment, described processing module comprises:
At least two modular converters, each described modular converter is corresponding with a kind of packing pattern of network packet, is used for the pack Network Transmission multimedia code stream of pattern of correspondence is converted to original elementary stream;
Determination module is used for the packet header according to described Network Transmission multimedia code stream network packet, determines the packing pattern of network packet in the described Network Transmission multimedia code stream;
Calling module is used to call the corresponding modular converter of packing pattern with described network packet.
Preferably, in the multimedia decoding apparatus of this embodiment, described packing pattern comprises: transport stream mode and internet stream media alliance pattern.
Preferably, the multimedia decoding apparatus of this embodiment also comprises: order module, before being used for being converted to original elementary stream, each network packet in the described Network Transmission multimedia code stream is sorted according to the timestamp and the bag serial number information of each network packet in the described Network Transmission multimedia code stream after obtaining described Network Transmission multimedia code stream, with described Network Transmission multimedia code stream.
The embodiment of the invention also provides a kind of video monitoring system, and as Fig. 3, this video monitoring system comprises:
The front monitoring front-end code device is exported after the front end coded multimedia information that is used for collecting becomes the Network Transmission multimedia code stream;
Multimedia decoding apparatus comprises:
Acquisition module is used to obtain the Network Transmission multimedia code stream of described front monitoring front-end code device output;
Processing module is used for the described Network Transmission multimedia code stream that obtains is converted to original elementary stream;
Decoder module is decoded to described original elementary stream, and the multimedia messages behind the output decoder;
Monitor terminal device is used to receive the multimedia messages of described multimedia decoding apparatus output, and plays.
Preferably, in the multimedia decoding apparatus of this video monitoring system, described processing module comprises:
At least two modular converters, each described modular converter is corresponding with a kind of packing pattern of network packet, is used for the pack Network Transmission multimedia code stream of pattern of correspondence is converted to original elementary stream;
Determination module is used for the packet header according to described Network Transmission multimedia code stream network packet, determines the packing pattern of network packet in the described Network Transmission multimedia code stream;
Calling module is used to call the corresponding modular converter of packing pattern with described network packet.
Multimedia decoding apparatus in the video monitoring system of the embodiment of the invention can adopt the multimedia decoding apparatus of above-described many middle embodiment, does not repeat them here.
As Fig. 4, the video monitoring system that shows the embodiment of the invention is carried out the schematic flow sheet of the method for video monitoring.As Fig. 4, this video frequency monitoring method comprises:
Preferably, the video frequency monitoring method of the embodiment of the invention, in the described step 401, described Network Transmission multimedia code stream transfers to described multimedia decoding apparatus in the network packet mode;
Described step 402 comprises:
Described multimedia decoding apparatus is determined the packing pattern of network packet in the described Network Transmission multimedia code stream according to the packet header of network packet in the described Network Transmission multimedia code stream;
Described multimedia decoding apparatus calls and the described corresponding modular converter of determining of packing pattern, and described Network Transmission multimedia code stream is converted to original elementary stream.
Preferably, the video frequency monitoring method of the embodiment of the invention, before step 401, also comprise: the step of the chained address of multimedia decoding apparatus request front monitoring front-end device, exemplarily, the front monitoring front-end device is registered to business platform earlier, and multimedia decoding apparatus is to the chained address of this front monitoring front-end device of business platform request.
Fig. 5 is the operation principle schematic diagram of the video monitoring system of another embodiment of the present invention, shows the structural framing schematic diagram of video monitoring whole system.As Fig. 5, the video monitoring system of this embodiment comprises: front end watch-dog, business platform, streaming media server, client, multimedia decoder and monitor terminal; Wherein, monitor terminal is an example with the monitoring TV wall; Multimedia decoder is an example with the video monitoring decoder.Exemplarily, client is served as by the computer that is provided with client-side program, by running client program on computers, can be managed for configuration monitoring frontend and video monitoring decoder; The front end watch-dog is used to gather the front end audio/video information, and is sent to streaming media server or video monitoring decoder after the media information that collects is encoded into the medium code stream; Business platform is used for for the registration of monitoring frontend, client, video monitoring decoder and streaming media server and management etc.; Streaming media server is used to carry out the forwarding and the storage of Streaming Media.In this example, be that ISMA code stream front monitoring front-end device or TS code stream front monitoring front-end device are example with the front monitoring front-end device.Correspondingly, the multimedia code stream that transmits between ISMA code stream front monitoring front-end device or TS code stream front monitoring front-end device and streaming media server is ISMA stream or TS code stream.
In this example, decoding channels by client configuration monitoring TV wall, after order request begins, the video monitoring decoder obtains the chained address of front end watch-dog from business platform, connect monitoring frontend by this chained address, obtain from the front end watch-dog that multimedia code stream is decoded and display video on the monitoring TV wall.In this example, a plurality of front end watch-dogs are arranged, receive the multimedia code stream of not going the same way respectively.In this example, video monitoring system is carried out the handling process of video monitoring with reference to shown in Figure 6.Among Fig. 6, be that ISMA code stream or TS code stream are that example describes with transmission code stream between video monitoring decoder and the front monitoring front-end.As Fig. 6, the video monitoring of this embodiment is handled and is comprised the steps:
Step 601, administrative client, a plurality of monitoring frontend and streaming media server will be registered to video monitoring service platform respectively, the management of the platform of accepting business;
Step 602 is configured when the user plays passage by client to the video monitoring decoder, and selection need be when the front monitoring front-end that video wall is play, and client connects the media stream server on the decoder, and sends the monitoring request to decoder; Exemplarily, the request that this monitoring request can the multi-path monitoring passage also can be the request of one road monitor channel; Can be the request of taking turn, also can be the request of clean culture; Can be the request of program request, also can be the request of direct-connected encoder; Monitoring frontend output can be the MPEG4 of TS or ISMA packing manner, H.264, the Network Transmission multimedia code streams such as combination of video and G series sound, AAC, AMR audio frequency H.263.
Step 603, decoder is to the chained address URL of the monitoring frontend of business platform application desire broadcast;
Step 604, under the proper network situation, need the make an immediate response request of decoder of business platform, the video monitoring decoder connects streaming media server, and sends ISMA stream or TS code stream application request; Streaming media server sends the ISMA code stream or the TS code stream of RTP packing to decoder; Wherein the TS code stream is that Voice ﹠ Video mixes, and the ISMA code stream separates; Send mode can use TCP, UDP and multicast transmission layer protocol etc.;
After step 605, decoder are received first RTP, just begin to analyze the packet header of RTP bag, obtain the loadtype of RTP bag, loadtype can be a number of different types;
Step 606, sorting operation is because out of order, the shake of bag generation that different network environments may cause decoder to receive, particularly use the RTP bag of UDP transmission, need carry out operations such as out of order rearrangement to each RTP bag, (QoS, Quality of Service) improves service quality.Sequencer procedure requires information such as each band timestamp and bag sequence number, therefore must finish before unpacking.By ordering, overcome out of order issuable signal disturbance, thereby the code stream that the network packet after the ordering constitutes steadily can have been sent;
Step 607 will be converted to the original elementary stream of audio frequency and video through the network packet after the ordering; Fig. 7 has provided a processing example of this step;
Step 608, by decoder module such as decoding chip, exemplarily the DSP decoding chip is decoded to original elementary stream, and at monitor terminal, shows on the monitoring TV wall in this example;
Step 609 when the user stops to play, is initiatively closed and being connected of streaming media server by decoder.
Comprise in this routine video monitoring system: streaming media server, business platform and client, concrete scene flows media server, business platform and client according to video surveillance applications are not necessary, can realize that the functional module of corresponding function or device substitute by other yet.
Should be that ISMA code stream or TS code stream are example with the transmission code stream between front monitoring front-end device and the video monitoring decoder only in the example in addition, but not limit to and ISMA code stream or TS code stream, also can be the multi-media network transmission code stream of other packing pattern.
Among Fig. 7, in the coding/decoding method of one embodiment of the invention, after network packet is sorted, comprise that also the packing pattern according to the network packet of determining sends to the conversion that corresponding modular converter carries out ES stream with network packet.In this example, the RTP transmission code stream of input multimedia decoder is that TS code stream and ISMA code stream are example.Correspondingly, modular converter comprises TS demultiplexing module and ISMA parse module.Wherein, the TS demultiplexing module is converted to the ES code stream with the TS code stream, and the ISMA parse module is converted to the ES code stream with the ISMA code stream.The ES code stream comprises: ES stream audio data and ES stream video data.Wherein, ES stream audio data comprise: G series voice data, sound/modulator-demodulator plug-in card (AMR, Audio/MODEMRiser) voice data, Advanced Audio Coding (AAC, Advanced Audio Coding) voice data; ES stream video data comprises: H264 video data, H263 video data, MPEG 4 video datas.The ES code stream of changing out imports decoder module again such as decoding chip is decoded.
Particularly, the coding/decoding method of the embodiment of the invention calls corresponding modular converter according to the code stream type that the RTP bag obtains: as then calling the ISMA parse module for the ISMA code stream, unpack and obtain ES audio stream and ES video flowing after the network packet ordering; If TS stream then calls the TS demultiplexing module, obtain ES audio stream and ES video flowing.This method can ad infinitum be expanded its application, under the prerequisite that need not make amendment to decoding chip, uses card format, constantly increases the decoding type.Use ES stream has not had the information of TS code stream and ISMA transmission means, has simplified the workload of decoding chip greatly, has reduced decoding chip operation flow process.Audio ES stream and video ES flow point are not sent into decoding chip decoding, display image on display terminal.
The coding/decoding method of prior art all is directly the transmission code rate input decoding chip of monitoring frontend output to be decoded usually, and this method compatibility is bad, has limited the decode content of decoding chip.To some specific system architectures, the work that TS demultiplexing or ISMA unpack will be finished on decoding chip, has increased the burden of decoding chip.The coding/decoding method that the present invention proposes, because decoding chip only needs ES stream is decoded, and need not on decoding chip, to finish the work that TS demultiplexing or ISMA unpack, thereby simplified greatly decoding chip workload, reduced decoding chip operation flow process, increased the portability of system, reduced the workload of subsequent upgrade and maintenance, and, convert original elementary stream to by direct multi-media network transmission code stream various packing patterns, increase the codec format compatibility of decoder greatly, can ideally realize the adaptive decoding of various code streams.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1. a multimedia decoding method is characterized in that, comprises the steps:
Steps A, multimedia decoding apparatus are obtained the Network Transmission multimedia code stream;
Step B, described multimedia decoding apparatus is converted to original elementary stream with the described Network Transmission multimedia code stream that obtains;
Step C, described multimedia decoding apparatus is decoded to described original elementary stream.
2. multimedia decoding method according to claim 1 is characterized in that,
In the described steps A, described Network Transmission multimedia code stream transfers to described multimedia decoding apparatus in the network packet mode,
Described step B comprises:
Described multimedia decoding apparatus is determined the packing pattern of network packet in the described Network Transmission multimedia code stream according to the packet header of network packet in the described Network Transmission multimedia code stream;
Described multimedia decoding apparatus calls and the described corresponding modular converter of determining of packing pattern, and described Network Transmission multimedia code stream is converted to original elementary stream.
3. multimedia decoding method according to claim 2 is characterized in that, described packing pattern comprises: transport stream mode and internet stream media alliance pattern.
4. multimedia decoding method according to claim 2 is characterized in that, after obtaining described Network Transmission multimedia code stream, with described Network Transmission multimedia code stream, be converted to original elementary stream before, also comprise:
Timestamp and bag serial number information according to each network packet in the described Network Transmission multimedia code stream sort to each network packet in the described Network Transmission multimedia code stream.
5. according to each described multimedia decoding method among the claim 2-4, it is characterized in that,
In the described steps A, described multimedia decoding apparatus gets access to the different Network Transmission of the two-way at least multimedia code stream of packing pattern simultaneously;
Among the described step B, described multimedia decoding apparatus is determined in the described Network Transmission of the two-way at least multimedia code stream, the packing pattern of network packet in each road network network transmitting multimedia code stream, and the corresponding modular converter of packing pattern that calls and determine is converted to original elementary stream with described each road network network transmitting multimedia code stream.
6. a multimedia decoding apparatus is characterized in that, comprising:
Acquisition module is used to obtain the Network Transmission multimedia code stream;
Processing module is used for the described Network Transmission multimedia code stream that obtains is converted to original elementary stream;
Decoder module is decoded to described original elementary stream.
7. multimedia decoding apparatus according to claim 6 is characterized in that, described processing module comprises:
At least two modular converters, each described modular converter is corresponding with a kind of packing pattern of network packet, is used for the pack Network Transmission multimedia code stream of pattern of correspondence is converted to original elementary stream;
Determination module is used for the packet header according to described Network Transmission multimedia code stream network packet, determines the packing pattern of network packet in the described Network Transmission multimedia code stream;
Calling module is used to call the corresponding modular converter of packing pattern with described network packet.
8. multimedia decoding apparatus according to claim 7 is characterized in that, described packing pattern comprises: transport stream mode and internet stream media alliance pattern.
9. multimedia decoding apparatus according to claim 7 is characterized in that, also comprises:
Order module, before being used for being converted to original elementary stream, each network packet in the described Network Transmission multimedia code stream is sorted according to the timestamp of each network packet in the described Network Transmission multimedia code stream and the information of bag sequence number after obtaining described Network Transmission multimedia code stream, with described Network Transmission multimedia code stream.
10. a video frequency monitoring method is characterized in that, comprises the steps:
Steps A 1, multimedia decoding apparatus are obtained the Network Transmission multimedia code stream of front monitoring front-end code device output;
Step B1, described multimedia decoding apparatus is converted to original elementary stream with the described Network Transmission multimedia code stream that obtains;
Step C1, described multimedia decoding apparatus is decoded to described original elementary stream, and exports decoded multimedia messages to monitor terminal device, to play on monitor terminal device.
11. video frequency monitoring method according to claim 10 is characterized in that,
In the described steps A 1, described Network Transmission multimedia code stream transfers to described multimedia decoding apparatus in the network packet mode;
Described step B1 comprises:
Described multimedia decoding apparatus is determined the packing pattern of network packet in the described Network Transmission multimedia code stream according to the packet header of network packet in the described Network Transmission multimedia code stream;
Described multimedia decoding apparatus calls and the described corresponding modular converter of determining of packing pattern, and described Network Transmission multimedia code stream is converted to original elementary stream.
12. a video monitoring system is characterized in that, comprising:
The front monitoring front-end code device is exported after the front end coded multimedia information that is used for collecting becomes the Network Transmission multimedia code stream;
Multimedia decoding apparatus comprises:
Acquisition module is used to obtain the Network Transmission multimedia code stream of described front monitoring front-end code device output;
Processing module is used for the described Network Transmission multimedia code stream that obtains is converted to original elementary stream;
Decoder module is decoded to described original elementary stream, and the multimedia messages behind the output decoder;
Monitor terminal device is used to receive the multimedia messages of described multimedia decoding apparatus output, and plays.
13. video monitoring system according to claim 12 is characterized in that, described processing module comprises:
At least two modular converters, each described modular converter is corresponding with a kind of packing pattern of network packet, is used for the pack Network Transmission multimedia code stream of pattern of correspondence is converted to original elementary stream;
Determination module is used for the packet header according to described Network Transmission multimedia code stream network packet, determines the packing pattern of network packet in the described Network Transmission multimedia code stream;
Calling module is used to call the corresponding modular converter of packing pattern with described network packet.
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| CN103686205A (en) * | 2013-12-30 | 2014-03-26 | 浙江宇视科技有限公司 | Method and device for code stream transfer on basis of open network video interface forum (ONVIF) protocol |
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| CN103002353A (en) * | 2011-09-16 | 2013-03-27 | 杭州海康威视数字技术股份有限公司 | Method and device for packaging multimedia documents |
| CN103002353B (en) * | 2011-09-16 | 2015-09-02 | 杭州海康威视数字技术股份有限公司 | The method that multimedia file is encapsulated and device |
| CN103139662A (en) * | 2011-11-30 | 2013-06-05 | 北京航天长峰科技工业集团有限公司 | Universalization high-definition digital video service system |
| CN102802022A (en) * | 2012-08-28 | 2012-11-28 | 曙光信息产业(北京)有限公司 | Coding and decoding system and method |
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| CN104202656B (en) * | 2014-09-16 | 2017-08-04 | 国家计算机网络与信息安全管理中心 | Network audio MP3 flows out of order segmentation decoding method |
| CN104202656A (en) * | 2014-09-16 | 2014-12-10 | 国家计算机网络与信息安全管理中心 | Segmented decoding method for scrambled network audio MP3 (moving picture experts group audio layer 3) streams |
| CN106231208A (en) * | 2016-08-09 | 2016-12-14 | 杭州当虹科技有限公司 | A kind of multi-screen that realizes monitors mechanism and the method thereof of seamless taking turn |
| CN110636348A (en) * | 2018-06-22 | 2019-12-31 | 杭州海康威视系统技术有限公司 | Video playing method, device and system |
| CN110636348B (en) * | 2018-06-22 | 2021-12-31 | 杭州海康威视系统技术有限公司 | Video playing method, device and system |
| CN109120939A (en) * | 2018-07-16 | 2019-01-01 | 北京奇艺世纪科技有限公司 | A kind of video App coding/decoding method and device |
| CN109120939B (en) * | 2018-07-16 | 2021-04-06 | 北京奇艺世纪科技有限公司 | Video App decoding method and device |
| CN108900898A (en) * | 2018-08-21 | 2018-11-27 | 北京深瞐科技有限公司 | Video structural method, apparatus and system |
| CN113395546A (en) * | 2020-03-13 | 2021-09-14 | 杭州海康威视数字技术股份有限公司 | Control system, method and control equipment for media display |
| CN113395546B (en) * | 2020-03-13 | 2022-12-06 | 杭州海康威视数字技术股份有限公司 | Control system, method and control equipment for media display |
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