CN101729887A - Data transmission method and data transmission device of digital broadcasting system - Google Patents
Data transmission method and data transmission device of digital broadcasting system Download PDFInfo
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Abstract
The invention provides a data transmission method of a digital broadcasting system, which comprises the following steps: receiving a video stream containing a plurality of RTP data packets and the description information of the video stream; converting each RTP data packet into an enhanced IP data packet of a fixed length according to a preset rule; combining the enhanced IP data packets into an LDPC frame, encoding the LDPC frame and adding the encoded LDPC frame to a main service channel; generating a fast information group describing the video stream according to the description information of the video stream, and adding the fast information group into a fast information channel; and encapsulating the main service channel and the fast information channel into an assembly signal and transmitting the assembly signal. In the data transmission method, video data is encapsulated through RTP and the RTP data packets are packed into the enhanced IP data packets in a segmenting way, so the unnecessary description information is omitted and the data transmission efficiency of a video service in a digital multimedia system is improved.
Description
Technical field
The present invention relates to the DMB technical field, particularly relate to a kind of data transmission method and device of digit broadcasting system.
Background technology
Compare with analog broadcastings such as existing frequency modulation, amplitude modulation, advantage such as digital audio broadcast system has that tonequality is good, the availability of frequency spectrum is high, can realize large-area single frequency network covering, receiver sensitivity height, mobile receptivity are good, because its digitized advantage, digital audio broadcast system can transmit diversified value added data business in the transmission of audio business, digital audio broadcasting also develops into present DMB (DMB, Digital Multimedia Broadcasting) gradually.DMB is an important component part of radio, film and television digitlization process.
Business in the DMB can be divided into three major types: audio service, data service and video traffic.Wherein audio service is with the time cycle generation audio data stream of MUSICAM (a kind of digital audio and video signals compression algorithm) encryption algorithm with 24 millisecond of one frame; And the business data flow of data service and video traffic, all according to the professional definition of data stream format that specifically needs separately.
For video traffic, a kind of common data stream format is TS (transmission) stream in T-DMB (Terrestrial DigitalMultimedia Broadcasting, the T-DMB) system.The mode of these TS streamed video data is that the data after the compression encapsulate with the MPEG4 layer, sync, encapsulate with the MPEG2 transport stream again with the video data of MPEG2 transport stream encapsulation compression.Wherein, MPEG (Moving Pictures Experts Group, dynamic image expert group) be the working group of the relevant moving picture experts group standard of formulation of International Organization for Standardization establishment, the standard of being formulated is a general international standard, is mpeg standard (MPEG2, MPEG4).
When using MPEG2 standard compression video data, code check commonly used is 2-20Mbps (bps represents the byte number that can transmit each second) often, it is quite low that TS encapsulates necessary descriptor shared ratio in total data flow, generally below 1%, is 20-30Kbps.
And the code check of the video traffic in the T-DMB system is generally 384Kbps, code check commonly used far below the MPEG2 system, TS encapsulates ratio that necessary descriptor takies up to about 10% in total data stream thus, thereby has caused the decline of entire system efficiency of transmission.
Hence one can see that, and a technical problem that presses for those skilled in the art's solution at present is exactly: the data transmission efficiency that how to improve video traffic in the T-DMB system.
Summary of the invention
Technical problem to be solved by this invention provides a kind of data transmission method and device of digit broadcasting system, can improve the data transmission efficiency of video traffic in the existing digital multimedia system greatly.
In order to address the above problem, the invention discloses a kind of data transmission method for uplink of digit broadcasting system, this method can comprise:
Reception comprises the video flowing and the described video flowing descriptor of plurality of RTP data packets; According to presetting rule, described RTP packet is converted to the enhanced IP data packets of fixed length; Described enhanced IP data packets is assembled into the LDPC frame, and described LDPC frame is encoded, and add the LDPC frame behind the coding to MSC; Generate the fast information group of describing described video flowing according to described video flowing descriptor, and add described fast information group to fast information channel in dab receiver; Described MSC and fast information channel in dab receiver are packaged into the assembly signal, and send described assembly signal.
Further, described presetting rule is: the RTP packet is converted to the enhanced IP data packets that length is 192 bytes; Comprise in each enhanced IP data packets: the packet header banner word of 1 byte, the valid data load of 187 bytes, the cyclic redundancy check (CRC) code of the option of 2 bytes and 2 bytes.
Concrete, the length of described LDPC frame is 1920 bytes; By the length of described enhanced IP data packets, the length and the LDPC encoding rate of LDPC frame, determine to comprise in the LDPC frame number of enhanced IP data packets.
Further, according to the quantity of the enhanced IP data packets that comprises in the described LDPC frame, the speed of control of video transfer of data.
In order to address the above problem, the invention discloses a kind of data sending device of digit broadcasting system, this device can comprise:
Receiving element is used to receive the video flowing and the described video flowing descriptor that comprise plurality of RTP data packets;
The enhanced IP data packets generation unit is used for according to presetting rule, described RTP packet is converted to the enhanced IP data packets of fixed length;
The data framing unit is used for described enhanced IP data packets is assembled into the LDPC frame, and described LDPC frame is encoded, and adds the LDPC frame behind the coding to MSC;
The descriptor generation unit is used for generating the fast information group of describing described video flowing according to described video flowing descriptor, and adds described fast information group to fast information channel in dab receiver;
Assembly signal generation unit is used for described MSC and fast information channel in dab receiver are packaged into the assembly signal, outputs to transmitter and sends.
Concrete, described presetting rule is: the RTP packet is converted to the enhanced IP data packets that length is 192 bytes; Comprise in each enhanced IP data packets: the packet header banner word of 1 byte, the valid data load of 187 bytes, the cyclic redundancy check (CRC) code of the option of 2 bytes and 2 bytes.
In order to address the above problem, the invention also discloses a kind of data receive method of digit broadcasting system, this method can comprise:
Receive the assembly signal; Described assembly signal demultiplexing is obtained MSC and fast information channel in dab receiver; The LDPC frame of having encoded in the described MSC is decoded, obtain the LDPC frame; Described LDPC frame is decoded, and the IP packet is enhanced; Described enhanced IP data packets is carried out decapsulation, obtain the RTP video flowing; Fast information group in the described fast information channel in dab receiver is decoded, obtain the video flowing descriptor.
Further, when described LDPC frame is decoded, the bag of first verification enhanced IP data packets counting and cyclic redundancy check (CRC) code.If verification is correct, then skip the LDPC decode procedure, directly decode; If verification is incorrect, then the part of makeing mistakes is carried out LDPC decoding.
In order to address the above problem, the invention also discloses a kind of data sink of digit broadcasting system, this device can comprise:
Receiver module is used to receive the assembly signal;
Assembly signal demultiplexing module is used for described assembly signal demultiplexing is obtained MSC and fast information channel in dab receiver;
LDPC frame decoding module, the LDPC frame that is used for described MSC has been encoded is decoded, and obtains the LDPC frame;
Decoder module is used for described LDPC frame is decoded, and the IP packet is enhanced;
Decapsulation module is used for enhanced IP data packets is carried out decapsulation, obtains the RTP video flowing;
The fast information group decoder module is used for the fast information group of described fast information channel in dab receiver is decoded, and obtains the video flowing descriptor.
Further, described device also comprises judge module and decoding module.Described judge module is used for when described LDPC frame is decoded, the bag of verification enhanced IP data packets counting and cyclic redundancy check (CRC) code.If verification is correct, then skip decoding module; If verification is incorrect, then the part of makeing mistakes is carried out LDPC decoding by described decoding module.
Compared with prior art, the present invention has the following advantages:
In solution of the present invention, video data is adopted RTP (Real-time TransportProtocol, RTP) encapsulation, and be that enhanced IP data packets is transmitted with RTP packet partition packetization, owing to removed unnecessary descriptor, thereby improved the data transmission efficiency of video traffic in the digital multimedia system.
Further, long 192 bytes of each enhanced IP data packets, payload is 188 bytes, just in time can transmit complete TS bag, realizes the compatibility of the present invention to TS stream.
In addition, because the present invention uses LDPC (Low Density Parity Check, low-density checksum) coding, comprise an integer enhanced IP data packets in each LDPC frame, each enhanced IP data packets all has cyclic redundancy check (CRC) code (CRC), and data bit and check digit sequence arrangement, receiver end can be skipped the LDPC decode procedure, check the CRC of enhanced IP data packets earlier, if CRC check is correct, then do not need to carry out LDPC decoding, reduce the complexity of receiver decoding algorithm thus, thereby reduce the power consumption of receiver, prolong the service time of receiver.
Description of drawings
Fig. 1 is the flow chart of steps of the data transmission method for uplink embodiment of digit broadcasting system of the present invention;
Fig. 2 is the structural representation of enhanced IP data packets of the present invention;
Fig. 3 is the structured flowchart of the data sending device embodiment of digit broadcasting system of the present invention;
Fig. 4 is the flow chart of steps of the data receive method embodiment of digit broadcasting system of the present invention;
Fig. 5 is the structured flowchart of the data sink embodiment of digit broadcasting system of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The present invention is applied in the digital multimedia broadcasting system.Digital multimedia broadcasting system has service integration structure flexibly, can transmit the data service and the real-time video traffic of various ways in the high quality audio service.The data of emission transmission simultaneously are generically and collectively referred to as an assembly signal in 1.536MHz analog radio frequency bandwidth, can transmit the multichannel business datum simultaneously in the assembly signal, these business datums can be audio data streams, also can be the data flow of video or other multimedia services.The present invention mainly is the transmission method at video flowing.
With reference to Fig. 1, show the data transmission method for uplink embodiment of digit broadcasting system of the present invention, specifically can comprise:
Wherein, described video flowing is to carry out real-time coding by the video flowing that video encoder is imported the RTP mode, generates the video flowing with the encapsulation of RTP form.Video flowing after the described encapsulation is to send with the ip multicast form by local area network (LAN) in UDP (UserDatagram Protocol, user datagram) mode.The main effect of udp protocol is the form that network data flow is compressed into datagram.A typical datagram is exactly the unit of transfer of a binary data, and preceding 8 bytes of each datagram are used for comprising header information, and remainder bytes then is used for comprising concrete transmission data.UDP datagram is made up of datagram header field (UDP header) and useful data territory (Data), and wherein the datagram header field comprises: source port (Source Port), destination interface (Destination Port), datagram length (Length), verification and (Checksum).
Preferably, the described RTP packet that receives is converted to the EIP bag that length is 192 bytes, as shown in Figure 2, what EIP wrapped comprises: the packet header banner word 201 of 1 byte; The valid data load 202 of 187 bytes; The CRC204 of 203 and 2 bytes of the option of 2 bytes (Opt).Concrete transfer process is: is the unit segmentation with the RTP packet according to 187 bytes, and as the valid data load of EIP bag, if the RTP packet can not be divided exactly by 187, insufficient section is then in the end filled with 0x00 in an EIP bag; In addition, each EIP bag also all comprises the packet header banner word of 1 byte, the CRC of the Opt of 2 bytes and 2 bytes, wherein first byte of Opt part is with the number of byte of padding in the current EIP bag of no symbol binary number representation, and second byte is the packet counting.Wherein, the EIP bag can carry out the adjustment of length according to different encryption algorithms, is not limited to 192 bytes.
Further, EIP pack arrangement of the present invention can compatible existing various video data format.For example, TS stream is formed for continuous bag, 188 bytes of each TS bag, when the TS bag is converted to the EIP bag, preceding 188 bytes are the data of this TS bag in the EIP bag, the packet header banner word is the banner word of TS bag, and the EIP bag also comprises the packet counting of two bytes and the CRC of two bytes, constitutes 192 bytes of each EIP bag.
Wherein, according to LDPC design, each LDPC frame frame length is 15360 bits, i.e. 1920 bytes, and every frame is assemblied to form by several EIP bags.The concrete number of EIP bag is by the decision of LDPC encoding rate, as: the length of preferred EIP bag is 192 bytes, when the LDPC encoding rate is 4/5, comprises 8 packets (1920 * 4/5=192 * 8) in each frame; When the LDPC encoding rate is 9/10, comprise 9 packets (1920 * 9/10=192 * 9) in each frame.
Further, can also be according to the quantity of the EIP bag that comprises in the described LDPC frame, the speed of control of video transfer of data.
Business/subchannel transmission mode of existing T-DMB is: each transmission frame is 6144 bytes, corresponding 24 milliseconds transmission time, business datum is all transmitted in the MSC in transmission frame, when a plurality of business of transmission, MSC is divided into corresponding a plurality of subchannels, each professional transmission rate is the byte number and the ratio in corresponding frame period (24 milliseconds) that corresponding subchannel takies in transmission frame, as one in transmission frame, corresponding subchannel takies the business of 1152 bytes, and its transmission rate is 384Kbps (1152 bytes * 8 bits/24 millisecond=384Kbps).
EIP bag transmission means of the present invention and existing T-DMB system compatible under the prerequisite that the LDPC frame length is determined (1920 bytes), at first determine that according to the LDPC encoding rate EIP in each LDPC frame wraps quantity.Come control transmission speed by the quantity that is controlled at EIP bag in the transmission frame then, as when comprising 8 EIP bags (being that the LDPC encoding rate is 4/5) in each LDPC frame: if these 8 EIP wrap in the transmission frame and transmit, then its transmission rate is 640Kbps (8 * 192 bytes * 8 bits/(4/5)/24 millisecond=640Kbps); If this LDPC frame transmits in two continuous transmission frames, when promptly having only 4 EIP bags in each transmission frame, then its transmission rate is 320Kbps (4 * 192 bytes * 8 bits/(4/5)/24 millisecond=320Kbps).
General, if transmit corresponding N EIP in each transmission frame, certain business wraps, transmission rate that then should business is R=N * 192 * 8/R
LDPC(encoding rate)/24 millisecond.
Some unnecessary descriptors when the present invention has removed the TS encapsulation are compared the TS stream transmission mode, have improved the overall transfer efficient of system greatly, can also realize compatible TS flow structure simultaneously.
With reference to Fig. 3, show the data sending device embodiment of digit broadcasting system of the present invention, specifically can comprise:
Receiving element 301 is used to receive the video flowing and the described video flowing descriptor that comprise plurality of RTP data packets;
EIP wraps generation unit 302, is used for according to presetting rule, described RTP packet is converted to the EIP bag of fixed length;
Assembly signal generation unit 305 is used for described MSC and fast information channel in dab receiver are packaged into the assembly signal;
Transmitting element 306 is used to send described assembly signal.
Preferably, described presetting rule is: the RTP packet is converted to the EIP bag that length is 192 bytes; Comprise in each EIP bag: the packet header banner word of 1 byte, the valid data load of 187 bytes, the CRC of the Opt of 2 bytes and 2 bytes.
With reference to Fig. 4, show the data receive method embodiment of digit broadcasting system of the present invention, specifically can may further comprise the steps:
Step 401 receives the assembly signal;
Step 403 is decoded to the LDPC frame of having encoded in the described MSC, obtains the LDPC frame;
Step 404 is decoded to described LDPC frame, obtains the EIP bag;
Step 405 is carried out decapsulation to described EIP bag, obtains the RTP video flowing;
Step 406 is decoded to the fast information group in the described fast information channel in dab receiver, obtains the video flowing descriptor.
Further, when described LDPC frame is decoded, the bag counting and the CRC of first verification EIP bag.If verification is correct, then skip the LDPC decode procedure; If verification is incorrect, then the part of makeing mistakes is carried out LDPC decoding.
The LDPC cataloged procedure belongs to systematic code, and the redundancy check data that generates in promptly protected data and the cataloged procedure is a sequential delivery, and promptly the first half of each frame is original protected data, the redundancy check data that latter half generates for the LDPC cataloged procedure.As in the present invention, when encoding rate is 4/5, preceding 1536 bytes of each LDPC frame are 8 EIP bags, during reception, earlier preceding 1536 bytes are analyzed the bag counting and the CRC of verification EIP bag, if complete verification is correct, then show this 8 EIP bags, promptly error of transmission does not take place in the data of 1536 bytes, promptly can skip the LDPC decode procedure; If verification is incorrect, then can only carry out LDPC decoding at the part of makeing mistakes.
And T-DMB of the prior art system does not have similar EIP pack arrangement of the present invention and CRC check, when receiver decoding, directly carries out outer code decoder (as the decoding of the RS in the T-DMB system).
Thus, the present invention has reduced the complexity of LDPC decoding algorithm, thereby reduces total complexity of whole receiver decode procedure, finally acquires a certain degree to go up to reduce receiver power consumption, the purpose that prolongs portable receiver stream time.
With reference to Fig. 5, show the data sink embodiment of digit broadcasting system of the present invention, specifically can comprise:
Assembly signal demultiplexing module 502 is used for described assembly signal demultiplexing is obtained MSC and fast information channel in dab receiver;
LDPC frame decoding module 503, the LDPC frame that is used for described MSC has been encoded is decoded, and obtains the LDPC frame;
Fast information group decoder module 506 is used for the fast information group of described fast information channel in dab receiver is decoded, and obtains the video flowing descriptor.
Further, described receiving system can also comprise: judge module and decoding module.Described judge module is used for when described LDPC frame is decoded, the bag counting and the CRC of verification EIP bag; If verification is correct, then skip decoding module; If verification is incorrect, then the part of makeing mistakes is carried out LDPC decoding by described decoding module.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
More than the data transmission method and the device of a kind of digit broadcasting system provided by the present invention is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the data transmission method for uplink of a digit broadcasting system is characterized in that, comprising:
Reception comprises the video flowing and the described video flowing descriptor of plurality of RTP data packets;
According to presetting rule, described RTP packet is converted to the enhanced IP data packets of fixed length;
Described enhanced IP data packets is assembled into the LDPC frame, and described LDPC frame is encoded, and add the LDPC frame behind the coding to MSC;
Generate the fast information group of describing described video flowing according to described video flowing descriptor, and add described fast information group to fast information channel in dab receiver;
Described MSC and fast information channel in dab receiver are packaged into the assembly signal, and send described assembly signal.
2. the method for claim 1 is characterized in that,
Described presetting rule is: the RTP packet is converted to the enhanced IP data packets that length is 192 bytes; Comprise in each enhanced IP data packets: the packet header banner word of 1 byte, the valid data load of 187 bytes, the cyclic redundancy check (CRC) code of the option of 2 bytes and 2 bytes.
3. the method for claim 1 is characterized in that,
The length of described LDPC frame is 1920 bytes; By the length of described enhanced IP data packets, the length and the LDPC encoding rate of LDPC frame, determine to comprise in the LDPC frame number of enhanced IP data packets.
4. the method for claim 1 is characterized in that,
According to the quantity of the enhanced IP data packets that comprises in the described LDPC frame, the speed of control of video transfer of data.
5. the data receive method of a digit broadcasting system is characterized in that, comprising:
Receive the assembly signal;
Described assembly signal demultiplexing is obtained MSC and fast information channel in dab receiver;
The LDPC frame of having encoded in the described MSC is decoded, obtain the LDPC frame;
Described LDPC frame is decoded, and the IP packet is enhanced;
Described enhanced IP data packets is carried out decapsulation, obtain the RTP video flowing;
Fast information group in the described fast information channel in dab receiver is decoded, obtain the video flowing descriptor.
6. the method described in claim 5 is characterized in that, when described LDPC frame is decoded, and the bag of first verification enhanced IP data packets counting and cyclic redundancy check (CRC) code,
If verification is correct, then skip the LDPC decode procedure, directly decode;
If verification is incorrect, then the part of makeing mistakes is carried out LDPC decoding.
7. the data sending device of a digit broadcasting system is characterized in that, comprising:
Receiving element is used to receive the video flowing and the described video flowing descriptor that comprise plurality of RTP data packets;
The enhanced IP data packets generation unit is used for according to presetting rule, described RTP packet is converted to the enhanced IP data packets of fixed length;
The data framing unit is used for described enhanced IP data packets is assembled into the LDPC frame, and described LDPC frame is encoded, and adds the LDPC frame behind the coding to MSC;
The descriptor generation unit is used for generating the fast information group of describing described video flowing according to described video flowing descriptor, and adds described fast information group to fast information channel in dab receiver;
Assembly signal generation unit is used for described MSC and fast information channel in dab receiver are packaged into the assembly signal, outputs to transmitter and sends.
8. device as claimed in claim 7 is characterized in that,
Described presetting rule is: the RTP packet is converted to the enhanced IP data packets that length is 192 bytes; Comprise in each enhanced IP data packets: the packet header banner word of 1 byte, the valid data load of 187 bytes, the cyclic redundancy check (CRC) code of the option of 2 bytes and 2 bytes.
9. the data sink of a digit broadcasting system is characterized in that, comprising:
Receiver module is used to receive the assembly signal;
Assembly signal demultiplexing module is used for described assembly signal demultiplexing is obtained MSC and fast information channel in dab receiver;
LDPC frame decoding module, the LDPC frame that is used for described MSC has been encoded is decoded, and obtains the LDPC frame;
Decoder module is used for described LDPC frame is decoded, and the IP packet is enhanced;
Decapsulation module is used for enhanced IP data packets is carried out decapsulation, obtains the RTP video flowing;
The fast information group decoder module is used for the fast information group of described fast information channel in dab receiver is decoded, and obtains the video flowing descriptor.
10. the device described in claim 9 is characterized in that, also comprises judge module and decoding module,
Described judge module is used for when described LDPC frame is decoded, the bag of verification enhanced IP data packets counting and cyclic redundancy check (CRC) code; If verification is correct, then skip decoding module; If verification is incorrect, then the part of makeing mistakes is carried out LDPC decoding by described decoding module.
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| CN2008102242866A CN101729887B (en) | 2008-10-16 | 2008-10-16 | Data transmission method and data transmission device of digital broadcasting system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013097218A1 (en) * | 2011-12-31 | 2013-07-04 | 华为技术有限公司 | Stream media data processing method, device and system |
| CN103297173A (en) * | 2012-02-24 | 2013-09-11 | 国家广播电影电视总局广播科学研究院 | Method and device for transmission, distribution and receiving of data of digital audio broadcasting system in China |
| CN103778591A (en) * | 2012-10-18 | 2014-05-07 | 纬创资通股份有限公司 | Method and system for processing graphic operation load balance |
| WO2015103822A1 (en) * | 2014-01-08 | 2015-07-16 | 中兴通讯股份有限公司 | Method for transmitting information via wlan, method for receiving information and apparatus |
| CN110312147A (en) * | 2019-06-12 | 2019-10-08 | 高新兴科技集团股份有限公司 | Method, system and the storage medium of business data transmission |
| CN112436919A (en) * | 2020-10-14 | 2021-03-02 | 深圳思凯微电子有限公司 | Streaming data transmission method, device, equipment and computer readable storage medium |
| CN114866848A (en) * | 2022-04-02 | 2022-08-05 | 北京广播电视台 | IP video main and standby data filtering system and filtering method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7190681B1 (en) * | 1996-07-10 | 2007-03-13 | Wu William W | Error coding in asynchronous transfer mode, internet and satellites |
| CN101022571B (en) * | 2006-02-15 | 2011-08-03 | 华为技术有限公司 | System and method for realizing mobile multimedia service |
| CN101179735B (en) * | 2006-11-08 | 2010-07-14 | 中兴通讯股份有限公司 | Packaging method of multimedia broadcasting system media data flow |
| CN101217633B (en) * | 2007-01-04 | 2011-04-20 | 华为技术有限公司 | A method and system realizing stream media interaction |
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2008
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| WO2013097218A1 (en) * | 2011-12-31 | 2013-07-04 | 华为技术有限公司 | Stream media data processing method, device and system |
| CN103503401A (en) * | 2011-12-31 | 2014-01-08 | 华为技术有限公司 | Stream media data processing method, device and system |
| CN103503401B (en) * | 2011-12-31 | 2016-03-30 | 华为技术有限公司 | A kind of streaming medium data processing method, Apparatus and system |
| CN103297173A (en) * | 2012-02-24 | 2013-09-11 | 国家广播电影电视总局广播科学研究院 | Method and device for transmission, distribution and receiving of data of digital audio broadcasting system in China |
| CN103297173B (en) * | 2012-02-24 | 2016-08-03 | 国家广播电影电视总局广播科学研究院 | The sub data transmission of China's digital audio broadcast system connects receiving method, device |
| CN103778591A (en) * | 2012-10-18 | 2014-05-07 | 纬创资通股份有限公司 | Method and system for processing graphic operation load balance |
| WO2015103822A1 (en) * | 2014-01-08 | 2015-07-16 | 中兴通讯股份有限公司 | Method for transmitting information via wlan, method for receiving information and apparatus |
| CN110312147A (en) * | 2019-06-12 | 2019-10-08 | 高新兴科技集团股份有限公司 | Method, system and the storage medium of business data transmission |
| CN110312147B (en) * | 2019-06-12 | 2021-11-30 | 高新兴科技集团股份有限公司 | Method, system and storage medium for service data transmission |
| CN112436919A (en) * | 2020-10-14 | 2021-03-02 | 深圳思凯微电子有限公司 | Streaming data transmission method, device, equipment and computer readable storage medium |
| CN112436919B (en) * | 2020-10-14 | 2023-04-18 | 深圳思凯微电子有限公司 | Streaming data transmission method, device, equipment and computer readable storage medium |
| CN114866848A (en) * | 2022-04-02 | 2022-08-05 | 北京广播电视台 | IP video main and standby data filtering system and filtering method |
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