CN1516459A - Transferring ssytem of signal communication in digital multimedia broadcast system and mode - Google Patents
Transferring ssytem of signal communication in digital multimedia broadcast system and mode Download PDFInfo
- Publication number
- CN1516459A CN1516459A CNA031000967A CN03100096A CN1516459A CN 1516459 A CN1516459 A CN 1516459A CN A031000967 A CNA031000967 A CN A031000967A CN 03100096 A CN03100096 A CN 03100096A CN 1516459 A CN1516459 A CN 1516459A
- Authority
- CN
- China
- Prior art keywords
- communication
- signal
- channel
- digital multimedia
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention provides a system and mode of new signal multi-path multiplexing in OFDM broadcast network. In the invention, the mixed signals are modulated into different OFDM communication channels, each channel data includes a fixed quantity OFDM sub-carriers. Different Golay code, modulation and frequency expansion are used in communication of different service quality demand. The data is transmitted with data package of circular redundancy checking bit.
Description
Technical field
The present invention relates to the transfer system and the transfer mode of signal and communication in the digital multimedia broadcasting system, outstanding and relate to the transfer system and the transfer mode of video, audio frequency, control and data communication in the digital multimedia broadcasting system.
Background technology
The main challenge of wireless broadcast network of future generation is the communication of supporting integrated multimedia type on a unified network platform.One effectively, can support to have the transfer mode of various types of communication streams of various data transfer rates for realizing that above the requirement is very important.
Present European digital video broadcast system (DVB-T) has selected Orthodoxy Frequency Division Multiplex (OFDM) as modulating mode, and its reason is because it has as for advantages such as the robustness (robust) of multipath fading, spectral efficients.Combine with preposition error detection, can in exceedingly odious wireless channel, transmit data with relatively low complexity with High Data Rate based on the system of OFDM (Orthodoxy Frequency Division Multiplex).
In present DVB standard, video and voice communication transmit together, and do not establish special data channel.Data communication must with video and voice communication tied up in knots.Yet, make and to adopt different error protections and correction pattern to guarantee different service quality (QoS) because the difference of the substantive characteristics of these communications often wishes to transmit them with mixed mode in the channel that separates.For example, under worst condition of acceptance, keeping the reception of audio frequency.The audio signal communication is compared with video communication needs extra error protection.On the other hand, unlike being unidirectional video and voice communication in essence, data communication needs error detection usually, makes under situation about making a mistake, and can implement to retransmit the packet of losing with correction.
Summary of the invention
For solving the above problems, the objective of the invention is to propose a kind of transfer system and transfer mode that in the channel that separates, transmits video, audio frequency, control and data communication with the adjustable data transfer rate of software.
Transfer system according to signal and communication in the digital multimedia broadcasting system of first aspect present invention comprises:
One sheer is used at first mixed signals such as separating video, audio frequency, control and data;
A plurality of channel encoders can use block code, convolution code or cascaded code (for example cascaded code of convolution code (or Turbo code) and RS sign indicating number);
A plurality of constellation mapper, it can use QPSK, 16QAM, the even planisphere of 64QAM and 256QAM or 16QAM heterogeneous, the layering planisphere of 64QAM and 256QAM;
One frame forms device, is used for different communication signals are loaded into different bunches according to bunch allocation tables;
One OFDM modulator and front end is used for translation data and sends in the air by the RF signal.
Transfer system according to signal and communication in the digital multimedia broadcasting system of second aspect present invention, wherein said channel encoder can utilize the LDPC sign indicating number, because the built-in bit interleaver of LDPC no longer is provided with bit interleaver between LDPC channel encoder and constellation mapper.
According to the transfer system of signal and communication in the digital multimedia broadcasting system of third aspect present invention, wherein said front end is by pulse filter, digital-analogue (D/A) transducer, RF transmitter, compositions such as antenna.
Transfer mode according to signal and communication in the digital multimedia broadcasting system of fourth aspect present invention comprises step:
Before broadcasting, video, audio frequency and data communication are at first separated by sheer;
Utilize different chnnel codings and modulation, provide different protection levels communication streams;
Utilize constellation mapper, its output is loaded into the communication channel of separation, the combination of various codings, modulation and diversity mode can be applied to each communication channel;
The different speed and the error protection demands of data of all kinds communication satisfied in the distribution of using in the transfer mode based on the communication channel of cluster OFDM;
The wideband OFDM channel is divided into a plurality of groups with continuous carrier frequency according to frequency, become bunch, each communication channel can comprise several bunches, by distributing to different channels to different bunches simply, can satisfy the different data rate demand of communication channel at an easy rate;
The output of constellation mapper, passes to front end and transmits through the multiplexing OFDM symbol that forms with control channel.
Transfer mode according to signal and communication in the digital multimedia broadcasting system of fifth aspect present invention further comprises step:
Data communication stream in transmitting is divided into packet.Each data is surrounded by a sequence territory and a CRC (cyclic redundancy check (CRC)) territory, uses this two territories, can adopt complicated re-transmission pattern, guarantees reliable and active data communication.
Transfer mode according to signal and communication in the digital multimedia broadcasting system of sixth aspect present invention further comprises step:
Signal separates a simple multichannel sheer can utilizing in FPGA/ASIC in sheer obtains by the examination data packet head, and for data communication, packet is further utilized above-mentioned CRC (cyclic redundancy check (CRC)) protection.
Transfer mode according to signal and communication in the digital multimedia broadcasting system of seventh aspect present invention further comprises step:
Use the bit interleaver in the encoder to be used for interleaved bitstream, make system have better robustness aspect the sudden sum of errors attenuation channel of opposing, the bit of importing in bit interleaver (position) is to write with a matrix form that is listed as, with reading of delegation of delegation.
Transfer mode according to signal and communication in the digital multimedia broadcasting system of eighth aspect present invention further comprises step:
For satisfying different service requests, QPSK commonly used, 16QAM, the constellation mapping of 64QAM and 256QAM can be used for the coded-bit of own coding device in the future and be mapped as the constellation point of plural number, also can use 16QAM heterogeneous, the layering constellation mapping of 64QAM and 256QAM.
For example, in the QPSK combination, 2 bits are mapped to a compound signaling point, and 6 bits are mapped to 1 signaling point in the 64QAM combination.
Transfer mode according to signal and communication in the digital multimedia broadcasting system of ninth aspect present invention further comprises step:
In frame forms device, different communication signals are loaded on different bunches according to bunch allocation tables, make whole OFDM channel be divided into N bunch, each bunch has K subcarrier, M continuous frame of ofdm signal formation.
With a possible system is example, and whole 3880 subcarriers (adding 216 virtual carriers, altogether 4096 subcarriers) are divided into 956 bunches, 4 bunches of each subcarriers.20 remaining subcarriers are used for control signal and guiding carrier frequency.Each frame data comprises 20 ofdm signals, and each cocooning tool has the 20*4=80 subcarrier;
Then, according to a bunch allocation table, different communication signals be loaded into they bunch on, with control signal and guiding carrier wave, bunch formed the OFDM frame,
Transfer mode according to signal and communication in the digital multimedia broadcasting system of tenth aspect present invention further comprises step:
The output that frame forms device is imported into the OFDM modulator, in the OFDM modulator, the serial input at first is converted to parallel data in S/P, handle by 4096 IFFT then, after IFFT handles, insert Cyclic Prefix (CP), then, parallel data is converted into serial series again, inserts guiding (CDMA beacon signal) periodically; Be sent to front end through the OFDM modulated digital signal then, be modulated into the RF signal at last and be transmitted in the air.
Description of drawings
Fig. 1 uses the system block diagram of the transfer mode of video, audio frequency, control and data communication in the digital multimedia broadcasting system of the present invention;
Fig. 2 is the distribution of using in the transfer mode of video, audio frequency, control and data communication in digital multimedia broadcasting system of the present invention based on the communication channel of cluster OFDM;
Fig. 3 is the structure chart of the packet that uses in transfer mode of the present invention;
Fig. 4 A and Fig. 4 B are the ideographs of the decoder that uses in transfer mode of the present invention;
Fig. 5 is the QTSK constellation that coded data is shone upon;
Fig. 6 is the 64-QAM constellation that coded data is shone upon;
Fig. 7 is that frame of the present invention forms the device tactic pattern;
Fig. 8 is the block diagram of OFDM modulator of the present invention and front end.
Embodiment
Fig. 1 uses the composition and the functional-block diagram of system of the transfer mode of video, audio frequency, control and data communication in the digital multimedia broadcasting system of the present invention; As shown in Figure 1, before broadcasting, video, audio frequency and data communication are at first separated by sheer.Different chnnel codings can be applied in these communication streams so that different protection levels to be provided with modulation.The output of constellation mapper is loaded into the communication channel of separation.With control channel, all communication channels are passed to front end and transmit by the multiplexed OFDM symbol that forms.
Fig. 2 is the distribution of using in the transfer mode of video, audio frequency, control signal and data communication in digital multimedia broadcasting system of the present invention based on the communication channel of cluster OFDM; Here the pattern of Ti Chuing crucial innovation is to use the OFDM based on cluster to satisfy the different data rate of various communication types and the demand of error protection.Although cluster OFDM is used to multiple access in the literature, this pattern is not also used in wideband video broadcasting.
The wideband OFDM channel is divided into a plurality of groups with continuous frequency range according to frequency, becomes bunch.Bunch be the basic load unit of communication channel.Depend on the data transfer rate that needs, each communication channel can comprise several bunches.By distributing to different channels to different bunches simply, can satisfy the different data rate demand of communication channel at an easy rate.For example, the OFDM channel among Fig. 2 is divided into 16 bunches; Video communication 1 uses the 1st, 2,5,6,8,9,13 bunch, and other communication channel uses remaining bunch.
The combination of various codings, modulation and diversity mode can be applied to each communication channel.Some examples have been provided in the table 1.For example, use pattern 14, video channel 1 can have very high data transfer rate and relative more weak error protection ability, and voice communication be or/and control signal can adopt pattern 1, thus have very strong defensive ability/resistance ability for abominable condition of acceptance.
The example of coding/diversity mode that table 1 is possible
| Pattern | Modulation | Encoding | Diversity mode | |
| 1 | ?QPSK | ?1/8 | ||
| 2 | ?QPSK | |||
| 3 | ?QPSK | ?1 | ||
| 4 | ?QPSK | 2/3 | ?1 | |
| 5 | ?QPSK | ?1 | ||
| 6 | ?16QAM | ?1 | ||
| 7 | ?16QAM | 2/3 | ?1 | |
| 8 | ?16QAM | ?1 | ||
| 9 | ? | 5/6 | ?1 | |
| 10 | ?64QAM | ?1 | ||
| 11 | ?64QAM | 2/3 | ?1 | |
| 12 | ?64QAM | ?1 | ||
| 13 | ? | 5/6 | ?1 | |
| 14 | ?64QAM | 7/8 | MIMO (multiple-input and multiple-output) |
Except supporting to provide aspect different data transfer rates and the error protection the flexibility of height, this pattern can also be utilized the coding of rational size, obtains the frequency and the time diversity gain of time broad-band channel simultaneously.
Fig. 3 has shown a kind of possible structure of the packet that uses in the transfer mode of the present invention; For further guaranteeing data communication, data communication stream is divided into packet.Each data is surrounded by a sequence territory and a CRC (cyclic redundancy check (CRC)) territory.Use this two territories, can adopt complicated re-transmission pattern,, guarantee reliable and active data communication as the automatic repetitive requests of ARQ optionally.
As follows to system specifics of the present invention in conjunction with the accompanying drawings:
Sheer
Mixed signal (video, audio frequency, data and control signal) is at first separated in sheer, as shown in Figure 1.This work can utilize the simple multichannel sheer of in FPGA/ASIC to obtain by the examination data packet head.For data communication, further utilize above-mentioned CRC (cyclic redundancy check (CRC)) protection.
Channel encoder
Channel encoder can be block code, convolution code or cascaded code.A kind of possible embodiment is with convolution code (or Turbo code) and RS cascaded code, shown in Fig. 4 (A).
The embodiment of another possibility utilizes the LDPC sign indicating number, shown in Fig. 4 (B), because the built-in bit interleaver of LDPC just need not be provided with bit interleaver between LDPC and constellation mapping.
Bit interleaver in the encoder is to be used for interleaved bitstream, makes system have more robustness aspect sudden error code of opposing and the attenuation channel.Bit interleaver commonly used is the piece bit interleaver, and the bit of importing in bit interleaver (position) is to write with a matrix form that is listed as, with reading of delegation of delegation.Except the piece bit interleaver, also can use the convolution bit interleaver.
As mentioned above, for dissimilar communications, can use different coding mode/encoding rates.Utilize DSP, FPGA or ASIC can support different coding modes simultaneously.
Constellation mapping
For satisfying different service requests, QPSK commonly used, 16QAM, the constellation combination of 64QAM and 256QAM can be used for the coded-bit of own coding device in the future and be mapped as the constellation point of plural number, can use 16QAM heterogeneous, the layering constellation combination of 64QAM and 256QAM.
For example, the view of common QPSK and 64QAM combination as shown in Figure 5 and Figure 6.In QPSK, 2 bits are mapped to the constellation point of a plural number; And 6 bits are mapped to 1 constellation point in 64QAM.
Frame forms device
The modulation signal point of different communication signals (from constellation mapper output) incoming frame forms device, forms in the device at frame, and those signals are loaded on different bunches according to bunch allocation tables.As shown in Figure 7, whole OFDM channel is divided into N bunch, and each bunch has K subcarrier.M continuous ofdm signal forms a frame.For example, in a possible method, whole 3880 subcarriers (adding 216 virtual carriers, altogether 4096 subcarriers) are divided into 956 bunches, 4 bunches of each subcarriers.20 remaining subcarriers are used for control signal and guiding carrier frequency.Each frame data comprises 20 ofdm signals, and has such configuration, each cocooning tool have the 20*4=80 subcarrier (the real data subcarrier is normally a little bit smaller a little because bunch in also have some guiding carrier waves).
Then, according to a bunch allocation table, different communication signals be loaded into they bunch on, with control signal and guiding carrier wave, these bunches have formed the OFDM frame, for OFDM modulation is prepared.It should be noted that this bunch allocation table normally by service request determined, for example, qos requirement.Can see that this pattern is very flexibly---only change allocation table and just can support various types of communication needs
This frame forms device can be at DSP, works among FPGA or the ASIC.Main requirement is to satisfy the needs of OFDM frame to internal memory.In the above-described embodiment, the internal memory of 20*4096=80K word needs.
OFDM modulator and front end
As shown in Figure 8, the output from frame formation device is imported into the OFDM modulator.In the OFDM modulator, the serial input at first is converted to parallel data in S/P, handle by 4096 IFFT then, after IFFT handles, inserts Cyclic Prefix (CP).Then, insert guiding (for example CDMA beacon signal) periodically.This OFDM modulated digital signal is sent to front end then, and this front end is by the pulse-shaping filter, digital-analogue (D/A) transducer, and the RF transmitter, compositions such as antenna, last, the RF signal sends in the air.
In the pattern that the present invention proposes:
Video, audio frequency, control and data communication transmit in the communication channel with adjustable rate that separates (as different bunches).
The flexibility that allocated channel resource aspect provides height that is distributed in based on the communication channel of cluster OFDM.Combine with different coding, modulation and diversity gain pattern, can satisfy various data transfer rates and other demand of error protection level.
Be transmitted in based on the data of packet and all have a sequence header field and CRC territory in each packet, further promoted effectively and both-way communication reliably.
Claims (11)
1. the transfer system of signal and communication in the digital multimedia broadcasting system is characterized in that comprising:
One sheer is used at first separating mixture of source signals;
A plurality of channel encoders can utilize block code, convolution code or level joined mark;
A plurality of constellation mapper, it can use QPSK, 16QAM, the constellation combination of 64QAM and 256QAM or 16QAM heterogeneous, the layering constellation combination of 64QAM and 256QAM;
One frame forms device, is used for different communication signal roots are loaded into different bunches according to bunch allocation tables;
One OFDM modulator and front end is used for translation data and the RF signal sent in the air.
2. according to the transfer system of signal and communication in the digital multimedia broadcasting system of claim 1, it is characterized in that:
Described channel encoder can utilize the LDPC sign indicating number, because the built-in bit interleaver of LDPC no longer is provided with bit interleaver between LDPC channel encoder and constellation mapper.
3. according to the transfer system of signal and communication in the digital multimedia broadcasting system of claim 1, it is characterized in that:
Described channel encoder can convolution code or the level joined mark of Turbo code and RS sign indicating number.
4. according to the transfer system of signal and communication in the digital multimedia broadcasting system of claim 1, it is characterized in that:
Described front end is by pulse filter, digital-analogue (D/A) transducer, RF transmitter, compositions such as antenna.
5. the transfer mode of signal and communication in the digital multimedia broadcasting system is characterized in that comprising step:
Before broadcasting, video, audio frequency and data communication are at first separated by sheer;
Utilize different chnnel codings and modulation, provide different protection levels communication streams;
Utilize constellation mapper, its output is loaded into the communication channel of separation, the combination of various codings, modulation and diversity mode can be applied to each communication channel;
The different speed and the error protection demands of data of all kinds communication satisfied in the distribution of using in the transfer mode based on the communication channel of cluster OFDM;
The wideband OFDM channel is divided into a plurality of groups with continuous carrier frequency according to frequency, become bunch each communication channel and can comprise several bunches, by distributing to different channels to different bunches simply, can satisfy the different data rate demand of communication channel at an easy rate;
The output of constellation mapper, is passed to front end and transmits by the multiplexed OFDM symbol that forms with control channel.
6. according to the transfer mode of signal and communication in the digital multimedia broadcasting system of claim 1, it is characterized in that further comprising step:
Data communication stream in transmitting is divided into packet.Each data is surrounded by a sequence territory and a CRC (cyclic redundancy check (CRC)) territory, uses this two territories, can adopt complicated re-transmission pattern, guarantees reliable and active data communication.
7. according to the transfer mode of signal and communication in the digital multimedia broadcasting system of claim 1, it is characterized in that further comprising step:
The separation of signal in sheer can utilize the simple multichannel sheer of in FPGA/ASIC to obtain by the examination data packet head, and for data communication, packet is further utilized above-mentioned CRC (cyclic redundancy check (CRC)) protection.
8. according to the transfer mode of signal and communication in the digital multimedia broadcasting system of claim 1, it is characterized in that further comprising step:
Use the bit interleaver in the encoder to be used for permutated bit stream, make system have more robustness aspect the sudden sum of errors attenuation channel of opposing, the bit of importing in bit interleaver (position) is to write with a matrix form that is listed as, with reading of delegation of delegation.
9. according to the transfer mode of signal and communication in the digital multimedia broadcasting system of claim 1, it is characterized in that further comprising step:
QPSK commonly used, 16QAM, the constellation combination of 64QAM and 256QAM can be used in the future that the coded-bit of own coding device is mapped as compound signaling point, to satisfy different service requests, can use 16QAM heterogeneous, the layering constellation combination of 64QAM and 256QAM.
10. according to the transfer mode of signal and communication in the digital multimedia broadcasting system of claim 1, it is characterized in that further comprising step:
In frame forms device, different communication signals are loaded on different bunches according to bunch allocation tables, make whole OFDM channel be divided into N bunch, each bunch has K subcarrier.M continuous ofdm signal forms a frame.
11. the transfer mode according to signal and communication in the digital multimedia broadcasting system of claim 1 is characterized in that further comprising step:
The output that forms device from frame is imported into the OFDM modulator, in the OFDM modulator, the serial input at first is converted to parallel data in S/P, handle by 4096 IFFT then, after IFFT handles, insert Cyclic Prefix (CP), then, parallel data becomes serial series again again, regularly inserts guiding (CDMA beacon signal); Then this OFDM modulated digital signal is sent to front end, last, the RF signal is sent in the air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03100096 CN1228974C (en) | 2003-01-09 | 2003-01-09 | Transferring ssytem of signal communication in digital multimedia broadcast system and mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03100096 CN1228974C (en) | 2003-01-09 | 2003-01-09 | Transferring ssytem of signal communication in digital multimedia broadcast system and mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1516459A true CN1516459A (en) | 2004-07-28 |
| CN1228974C CN1228974C (en) | 2005-11-23 |
Family
ID=34238897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03100096 Expired - Fee Related CN1228974C (en) | 2003-01-09 | 2003-01-09 | Transferring ssytem of signal communication in digital multimedia broadcast system and mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1228974C (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006066445A1 (en) * | 2004-12-21 | 2006-06-29 | Zte Corporation | A encoding modulation and demodulation system and its method of transmitting and receiving signal |
| WO2008019536A1 (en) * | 2006-08-09 | 2008-02-21 | Timi Technologies Co., Ltd. | A method for transmitting control information to indicate the work of the receiver |
| CN100455016C (en) * | 2004-11-30 | 2009-01-21 | 华为技术有限公司 | Transmission method for video encoding signal |
| CN100461893C (en) * | 2007-03-21 | 2009-02-11 | 中兴通讯股份有限公司 | Mobile multimedia terminal and multiplexing allocation list updating method for lasting service |
| CN101031074B (en) * | 2006-02-28 | 2010-05-12 | 展讯通信（上海）有限公司 | Method for transmitting cell-phone and TV-set link-layer video based on code-flow precedence |
| CN101102171B (en) * | 2007-06-21 | 2010-06-09 | 中兴通讯股份有限公司 | A data processing method of mobile multi-media terminal |
| CN101803208A (en) * | 2007-09-14 | 2010-08-11 | 摩托罗拉公司 | Multi-layer cyclic redundancy check code in the wireless communication system |
| CN101047429B (en) * | 2006-05-10 | 2010-10-27 | 华为技术有限公司 | Method of resource distribution |
| CN101971503A (en) * | 2008-03-03 | 2011-02-09 | Rai意大利无线电视股份有限公司 | Bit permutation patterns for ldpc coded modulation and qam constellations |
| WO2011057562A1 (en) * | 2009-11-11 | 2011-05-19 | 北京泰美世纪科技有限公司 | Information transmission method and signal generation apparatus in ofdm system |
| CN1856109B (en) * | 2005-04-12 | 2011-07-27 | Lg电子株式会社 | Method for managing channel information in digital multimedia broadcast receiver |
| CN101268664B (en) * | 2005-09-20 | 2011-12-07 | 皇家飞利浦电子股份有限公司 | Method and system of diversity transmission of data |
| CN102694764A (en) * | 2011-08-17 | 2012-09-26 | 国家广播电影电视总局广播科学研究院 | Methods and devices for sending and receiving digital audio signal in digital audio broadcasting system |
| CN1969528B (en) * | 2004-07-30 | 2012-10-03 | 诺基亚公司 | Point-to-point repair response mechanism for point-to-multipoint transmission systems |
| WO2013023616A1 (en) * | 2011-08-17 | 2013-02-21 | 国家广播电影电视总局广播科学研究院 | Method and device for sending and receiving system information in digital audio broadcast system |
| CN102957651A (en) * | 2011-08-17 | 2013-03-06 | 北京泰美世纪科技有限公司 | Method and device for synchronization and receiving of digital audio broadcasting signal frequency |
| CN101483502B (en) * | 2009-02-24 | 2014-01-08 | 北京邮电大学 | Adaptive transmission method suitable for hybrid modulation mode |
| CN103534953A (en) * | 2011-05-18 | 2014-01-22 | 松下电器产业株式会社 | Parallel bit interleaver |
| CN103560857A (en) * | 2007-08-30 | 2014-02-05 | Lg电子株式会社 | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal |
| CN102067085B (en) * | 2008-04-17 | 2014-08-13 | 微系统道格有限公司 | Method and system for virtually delivering software applications to remote clients |
| CN106031113A (en) * | 2013-11-25 | 2016-10-12 | Lg电子株式会社 | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals |
| CN106301672A (en) * | 2015-05-19 | 2017-01-04 | 红阳科技股份有限公司 | Promote audio transmission system and the data processing method thereof of data correctness |
-
2003
- 2003-01-09 CN CN 03100096 patent/CN1228974C/en not_active Expired - Fee Related
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1969528B (en) * | 2004-07-30 | 2012-10-03 | 诺基亚公司 | Point-to-point repair response mechanism for point-to-multipoint transmission systems |
| CN100455016C (en) * | 2004-11-30 | 2009-01-21 | 华为技术有限公司 | Transmission method for video encoding signal |
| WO2006066445A1 (en) * | 2004-12-21 | 2006-06-29 | Zte Corporation | A encoding modulation and demodulation system and its method of transmitting and receiving signal |
| CN1856109B (en) * | 2005-04-12 | 2011-07-27 | Lg电子株式会社 | Method for managing channel information in digital multimedia broadcast receiver |
| CN101268664B (en) * | 2005-09-20 | 2011-12-07 | 皇家飞利浦电子股份有限公司 | Method and system of diversity transmission of data |
| CN101031074B (en) * | 2006-02-28 | 2010-05-12 | 展讯通信（上海）有限公司 | Method for transmitting cell-phone and TV-set link-layer video based on code-flow precedence |
| CN101047429B (en) * | 2006-05-10 | 2010-10-27 | 华为技术有限公司 | Method of resource distribution |
| US7978593B2 (en) | 2006-08-09 | 2011-07-12 | Timi Technologies Co., Ltd. | Method for transmitting control information to instruct receiver |
| WO2008019536A1 (en) * | 2006-08-09 | 2008-02-21 | Timi Technologies Co., Ltd. | A method for transmitting control information to indicate the work of the receiver |
| CN100461893C (en) * | 2007-03-21 | 2009-02-11 | 中兴通讯股份有限公司 | Mobile multimedia terminal and multiplexing allocation list updating method for lasting service |
| CN101102171B (en) * | 2007-06-21 | 2010-06-09 | 中兴通讯股份有限公司 | A data processing method of mobile multi-media terminal |
| CN103560857B (en) * | 2007-08-30 | 2018-06-05 | Lg电子株式会社 | Signal sending and receiving device and signal method of sending and receiving |
| CN103560857A (en) * | 2007-08-30 | 2014-02-05 | Lg电子株式会社 | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal |
| CN103795498B (en) * | 2007-08-30 | 2018-02-02 | Lg电子株式会社 | Signal sending and receiving device and signal method of sending and receiving |
| CN103795498A (en) * | 2007-08-30 | 2014-05-14 | Lg电子株式会社 | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal |
| CN103731240A (en) * | 2007-08-30 | 2014-04-16 | Lg电子株式会社 | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal |
| CN101803208A (en) * | 2007-09-14 | 2010-08-11 | 摩托罗拉公司 | Multi-layer cyclic redundancy check code in the wireless communication system |
| CN101803208B (en) * | 2007-09-14 | 2013-12-25 | 摩托罗拉移动公司 | Multi-layer cyclic redundancy check code in wireless communication system |
| CN101971503A (en) * | 2008-03-03 | 2011-02-09 | Rai意大利无线电视股份有限公司 | Bit permutation patterns for ldpc coded modulation and qam constellations |
| CN101971503B (en) * | 2008-03-03 | 2014-07-02 | Rai意大利无线电视股份有限公司 | Bit permutation patterns for LDPC coded modulation and QAM constellations |
| CN102067085B (en) * | 2008-04-17 | 2014-08-13 | 微系统道格有限公司 | Method and system for virtually delivering software applications to remote clients |
| CN101483502B (en) * | 2009-02-24 | 2014-01-08 | 北京邮电大学 | Adaptive transmission method suitable for hybrid modulation mode |
| WO2011057562A1 (en) * | 2009-11-11 | 2011-05-19 | 北京泰美世纪科技有限公司 | Information transmission method and signal generation apparatus in ofdm system |
| CN103534953A (en) * | 2011-05-18 | 2014-01-22 | 松下电器产业株式会社 | Parallel bit interleaver |
| CN102694764B (en) * | 2011-08-17 | 2017-03-15 | 国家新闻出版广电总局广播科学研究院 | Digital audio and video signals method of sending and receiving and device in digital audio broadcast system |
| WO2013023616A1 (en) * | 2011-08-17 | 2013-02-21 | 国家广播电影电视总局广播科学研究院 | Method and device for sending and receiving system information in digital audio broadcast system |
| CN102957651B (en) * | 2011-08-17 | 2017-03-15 | 北京泰美世纪科技有限公司 | A kind of digital audio broadcasting signal Frequency Synchronization and method of reseptance and its device |
| CN102957656B (en) * | 2011-08-17 | 2017-06-16 | 国家新闻出版广电总局广播科学研究院 | The sending and receiving methods and device of system information in digital audio broadcast system |
| CN102694764A (en) * | 2011-08-17 | 2012-09-26 | 国家广播电影电视总局广播科学研究院 | Methods and devices for sending and receiving digital audio signal in digital audio broadcasting system |
| CN102957651A (en) * | 2011-08-17 | 2013-03-06 | 北京泰美世纪科技有限公司 | Method and device for synchronization and receiving of digital audio broadcasting signal frequency |
| CN106031113A (en) * | 2013-11-25 | 2016-10-12 | Lg电子株式会社 | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals |
| CN106031113B (en) * | 2013-11-25 | 2019-07-16 | Lg电子株式会社 | The method and apparatus for sending the method and apparatus of broadcast singal and receiving broadcast singal |
| CN106301672A (en) * | 2015-05-19 | 2017-01-04 | 红阳科技股份有限公司 | Promote audio transmission system and the data processing method thereof of data correctness |
| CN106301672B (en) * | 2015-05-19 | 2019-03-22 | 红阳科技股份有限公司 | Promote the audio transmission system and its data processing method of data correctness |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1228974C (en) | 2005-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1228974C (en) | Transferring ssytem of signal communication in digital multimedia broadcast system and mode | |
| JP6514358B2 (en) | Broadcast signal transmitting / receiving apparatus and method | |
| KR100905350B1 (en) | System and method for interleaving | |
| JP5763249B2 (en) | Mapping subpackets to resources in a communication system | |
| US7681092B2 (en) | Systems and methods for interleaving and deinterleaving data in an OFDMA-based communication system | |
| CN1252955C (en) | Device and method for repeating high-speed data in CDMA mobile communication system | |
| KR100967429B1 (en) | Method and apparatus for multi-carrier hsdpa traffic transmission channel coding | |
| EP1938538B1 (en) | Method for variable sub-carrier mapping and device using the same | |
| KR102024611B1 (en) | A broadcast signal transmitting device, a broadcast signal receiving device, a broadcast signal transmitting method, and a broadcast signal receiving method | |
| CN107409113A (en) | Efficient WLAN（WLAN）In downlink signaling | |
| US20080310535A1 (en) | Method and apparatus for symbol transmission in an ofdm mobile communication system | |
| KR101889796B1 (en) | Apparatus and method for transreceiving broadcast signals | |
| WO2008049282A1 (en) | A multi-carrier digital mobile multimedia broadcast system and the digital information transmission method thereof | |
| CN1993916A (en) | Coding and modulation for broadcast and multicast services in a wireless communication system | |
| WO2006022727A1 (en) | Orthogonal-frequency-division-multiplex-packet-aggregation (ofdm-pa) for wireless network systems using error-correcting codes | |
| CN1806392A (en) | Apparatus and method for generating and decoding forward error correction codes having variable rate in a high-rate wireless data communication system | |
| CN1645786A (en) | Method and apparatus for transmitting/receiving a control signal on a high speed shared control channel | |
| CN1906908A (en) | Modulating and coding apparatus and method in a high-rate wireless data communication system | |
| MXPA06002405A (en) | Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system. | |
| CN111510246A (en) | Method and apparatus for receiving broadcast signal and method and apparatus for transmitting broadcast signal | |
| CN1516935A (en) | Radio communication method, radio transmitting device and receiving device | |
| CN112468195A (en) | Broadcast signal transmitting apparatus and method, and broadcast signal receiving apparatus and method | |
| CN115280694B (en) | Modulation and binary convolutional coding of multiple resource units in a wireless network | |
| CN1917411A (en) | System and method for realization of accessing high speed down going packets in multiple carriers | |
| CN1909538A (en) | Method for realizing data transmission in wireless access system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051123 Termination date: 20150109 |
|
| EXPY | Termination of patent right or utility model |