CN1960212A - Device and method for transferring control information in digital broadcast system - Google Patents
Device and method for transferring control information in digital broadcast system Download PDFInfo
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- CN1960212A CN1960212A CNA2006100890649A CN200610089064A CN1960212A CN 1960212 A CN1960212 A CN 1960212A CN A2006100890649 A CNA2006100890649 A CN A2006100890649A CN 200610089064 A CN200610089064 A CN 200610089064A CN 1960212 A CN1960212 A CN 1960212A
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Abstract
The physical channel of OFDM system is separated into several slots. The control info occupies one or more slots and the various businesses occupy the other. The data form of the control slot includes the system guide block, slot control block and attached info block. This method and means indicates effectively the transfer parameters of the businesses in the physical layer and is flexible. It supports various different business types and the definition of service quality. The control info is simultaneously transferred with business. This ensures the real-time in max limitation. After the business parameters renewed, the receiving end renews the receiving configuration instantly synchronously. It possesses extensional ability and can support new business types and the newly definitive service quality. It can be used in various broadcast area, e. g. the satellite broadcast, the land wireless broadcast and the handy land wireless broadcast.
Description
Technical field
The present invention relates to digital information transmission technical field, especially relate to a kind of devices and methods therefor that transmits based on the digit broadcasting system control information of OFDM.
Background technology
Digital broadcasting is except broad covered area, program capacity are big, and maximum characteristics have broadcasting exactly, a bit to multiple spot, a bit to multiaspect, the cost of broadcast message and number of users have nothing to do.Therefore, digital broadcasting has critical role as an important component part of ICT industry in national information infrastructure construction, realization universal service and national information security strategy.
In based on systems such as the terrestrial wireless broadcast of OFDM, ground hand-held broadcast, satellite broadcastings, business is divided into multiple different type, and simultaneously for the service of differentiation is provided, single business provides different service quality.Service quality is by a series of key parameter decisions such as modulation system, coded system, service attribute.Above-mentioned all business are transmitted in same physical channel by multiple connection.Receiving terminal receives behind the signal according to user's selection, needs exactly corresponding service is extracted from transmission signals, thereby finishes service process.Therefore, require transmission system that a kind of control method fast and effectively and device are provided, make receiving terminal can obtain to fast and reliable business information, selection and tap business datum.
Summary of the invention
As mentioned above, the method and apparatus that the purpose of this invention is to provide control information transmission in a kind of ofdm system, utilize this device can be with traffic type information, transmission parameter information and business datum in same channel, realize the demand of control multiple business and multiple transmission mode efficiently, can realize the needs of high power capacity digital broadcasting.
To achieve these goals, the invention discloses a kind of dispensing device of digit broadcasting system control information transmission, comprising: traffic data channel coding and interleaving treatment unit, it is used for the multiple business data are carried out chnnel coding and interlace operation; Control information chnnel coding and interleaving treatment unit, it is used for chnnel coding and interlace operation are carried out in control information; The framing unit, it is used for carrying out the framing operation through described multiple business data behind chnnel coding and the interlace operation and control information; And the OFDM modulating unit, it is used for being modulated to baseband signal to carrying out OFDM through the data after the framing operation; Wherein, be divided into several slots through each frame after the framing cell processing, control information takies one or several time slots of appointment, other time slot of multiple business data occupancy; And the data format of control time slot is for comprising: system's bootstrap block, time slot controll block and additional information piece; And control information sends to each unit simultaneously, is used in reference to be shown in the operation that each unit is finished in each time slot.
To achieve these goals, the invention discloses a kind of sending method of digit broadcasting system control information transmission, comprising: the step of the multiple business data of input being carried out chnnel coding and interlace operation; The control information of input is carried out the step of chnnel coding and interlace operation; To carrying out the step that framing is operated through described multiple business data behind chnnel coding and the interlace operation and control information; And to carrying out the step that OFDM is modulated to baseband signal through the data after the framing operation; Wherein, be divided into several slots through each frame after the framing cell processing, control information takies one or several time slots of appointment, other time slot of multiple business data occupancy; And the data format of control time slot is for comprising: system's bootstrap block, time slot controll block and additional information piece; Reach control information and send to each unit simultaneously, be used in reference to the step that is shown in the operation that each unit is finished in each time slot.
To achieve these goals, the invention discloses a kind of receiving system of digit broadcasting system control information transmission, it is characterized in that comprising: the OFDM demodulation unit, it is used for baseband signal is carried out demodulation; Separate frame unit, it is used for the data after the demodulation process are separated the frame operation, and outgoing traffic time slot and control time slot; Business time-slot channel-decoding and deinterleaving processing unit, it is used for the business time-slot of output is carried out channel-decoding and deinterleaving operation; And control time slot channel-decoding and deinterleaving processing unit, it is used for the control time slot is carried out channel-decoding and deinterleaving operation; Wherein, each frame of the data after the described receiving system of process is handled is divided into several slots, and the control information of recovery takies one or several time slots of appointment, other time slot of multiple business data occupancy; And the data format of control time slot is for comprising: system's bootstrap block, time slot controll block and additional information piece; And the control information that recovers sends to each unit simultaneously, is used in reference to be shown in the operation that each unit is finished in the business time-slot.
To achieve these goals, the invention discloses a kind of method of reseptance of digit broadcasting system control information transmission, comprising: the step of baseband signal being carried out demodulation operation; The later data of demodulation operation are separated the frame operation, and the step of outgoing traffic time slot and control time slot; The business time-slot of output is carried out the step of channel-decoding and deinterleaving operation; And the step of the control time slot of output being carried out channel-decoding and deinterleaving operation; Wherein, each frame of the data after the process receiving system is handled is divided into several slots, and the control information of recovery takies one or several time slots of appointment, other time slot of multiple business data occupancy; And the data format of control time slot is for comprising: system's bootstrap block, time slot controll block and additional information piece; Reach the control information that recovers and send to each unit simultaneously, be used in reference to the step that is shown in the operation that each unit is finished in the business time-slot.
According to the method and apparatus based on control information transmission in the digit broadcasting system of OFDM of the present invention, can indicate the transmission parameter of all business in physical layer efficiently, has very big flexibility, can support the definition of multiple different service types and service quality, and can transmit simultaneously with business, guaranteed real-time to greatest extent, after service parameter upgrades, receiving terminal more new receiver configuration synchronously immediately, has extensibility, the service quality of new business type and redetermination can be supported, satellite broadcasting can be widely used in, terrestrial wireless broadcast, each broadcast world such as ground hand-held broadcast.
Description of drawings
Fig. 1 is for using the transmission schematic diagram of digit broadcasting system control information transmitting device of the present invention.
Fig. 2 is the structured flowchart of digit broadcasting system control information dispensing device of the present invention.
Fig. 3 is the structured flowchart of digit broadcasting system control information receiving system of the present invention.
Fig. 4 is the structural representation of each frame after control information of the present invention and the multiple business data process framing cell processing.
Fig. 5 is the schematic diagram of the data format of control time slot of the present invention.
Fig. 6 is the composition schematic diagram of system's bootstrap block.
Fig. 7 is the composition schematic diagram of time slot controll block.
Fig. 8 is CRC check multinomial g of the present invention (x)=x12+x11+x3+x2+x+1 generation method schematic diagram.
Fig. 9 is the frame structure schematic diagram of the satellite mobile digital broadcast system of the specific embodiment of the invention.
Figure 10 is the schematic diagram of data format of control time slot of the satellite mobile digital broadcast system of the specific embodiment of the invention.
Figure 11 is the composition schematic diagram of additional information piece of the satellite mobile digital broadcast system of the specific embodiment of the invention.
Figure 12 is the schematic diagram of PI adapter block of the satellite mobile digital broadcast system of the specific embodiment of the invention.
Embodiment
Device based on control information transmission in the digit broadcasting system of OFDM provided by the invention can be with traffic type information, transmission parameter information and business datum in same channel, realize the demand of control multiple business and multiple transmission mode efficiently, can realize the needs of high power capacity digital broadcasting.The transmission schematic diagram that uses digit broadcasting system control information transmitting device of the present invention as shown in Figure 1, wherein dispensing device as shown in Figure 2, receiving system is as shown in Figure 3.
All business datums and control information are multiplexing to be transmitted in same physical channel, as shown in Figure 4.Specific transactions adopts the transmission mode and the COS of appointment.Wherein transmission mode comprises parameters such as physical carrier frequency, OFDM subcarrier-modulated pattern, chnnel coding pattern, interleaver mode, multiple connection pattern; COS is indicated this business classified information.Wherein the subcarrier-modulated pattern comprises any in BPSK, QPSK, 16QAM, 64QAM, 128QAM, 256QAM, 8PSK, 16APSK, the 32APSK modulation system.The subcarrier modulation modes of control information is any of BPSK, QPSK, 16QAM.
The time slot data format of the control information of being transmitted comprises three major parts as shown in Figure 5 altogether: 1 system's bootstrap block, the time slot controll block of a N time slot controlling packet formation and additional information piece that several additional information bags constitute that system's direct packets constitutes.Wherein the additional information pack arrangement is by system definition, any other data that can the transmission system definition.
System's direct packets is used to indicate system information, comprises 6 territories, is respectively as shown in Figure 6: regional call number territory LID, pilot frequency mode territory PM, the territory VER of version number, the territory DATA-TIME of length of a game, reservation territory RSV and verification territory CRC.
Wherein, the territorial scope of regional call number territory LID indication mechanism service.
The pilot frequency mode that pilot frequency mode territory PM indication ofdm signal adopts.
The version number of version number's territory VER indication mechanism is divided into two subdomains of major version number Main-V and sub-version number Sub-V.
The Greenwich Mean Time at the territory DATA-TIME of length of a game indication current time slots place is a unit with the second.Be divided into two times of subdomain: DY indication with respect to 2000; Absolute second number in the DS indication then.Transmitting terminal generates this territory.
Verification territory CRC adopts CRC check, and check polynomial is g (x)=x12+x11+x3+x2+x+1, and the generation method as shown in Figure 8.Register is reset to " 0 " state entirely before the input system direct packets.
Keep territory RSV and be changed to " 0 " entirely.
Control information is made up of the identical time slot controlling packet of some forms.The number of time slot controlling packet is identical with the number of time slot of transmission system definition.A service bearer is on one or more time slot, and each time slot controlling packet has comprised the physical parameter of this time slot and the business information of transmission.Its form comprises 3 territories as shown in Figure 7, is respectively that transmission mode is described territory STrD, type of service is described territory STyD and verification territory CRC.Wherein transmission mode is described the territory and is made up of 7 subdomains: frequency index territory FREQ, burst index territory, time slot index territory TSID, transmission make energy gap ACT, coding mode territory CM, interlace mode territory IM, modulating mode territory MM; Type of service is described the territory and is made up of types index territory TYPE, priority indication territory PRI, professional index territory SVID, type specification symbol territory DESCRIPTOR.
A particular time-slot in frequency index territory FREQ and the common tag system of time slot index territory TSID.
The unique identification service of professional index territory SVID, the professional index territory of different time slot controlling packet can be identical, in order to the time slot of indicating specific transactions to take.
Type specification symbol territory DESCRIPTOR is by system definition.
And when one of the using system appointment or several control time slots, what the control time slot adopted is by system's specified coding pattern, interlace mode and modulating mode in described coding mode territory, interlace mode territory and the modulating mode territory.
When the control time slot that uses more than system's appointment, the system of each control coding mode, interlace mode and modulating mode that time slot adopted specifies can be different.
More than explanation can be by following specific embodiment sets forth in detail:
A kind of satellite mobile digital broadcast system realizes that via satellite large-area broadcasting covers, and transmits the multiplex broadcasting business, and the user can realize moving and receive with terminal.This satellite mobile broadcasting systems uses the 25MHz bandwidth, is divided into the channel of three 8MHz, and each 8MHz channel transmits one road ofdm modulation signal.Three 8MHz frequencies are distinguished called after frequency 0, frequency 1, frequency 2.The every frame of satellite mobile digital broadcast system is 1 second, is made up of 40 time slots, and wherein time slot 0 (TS0) is used for control information transmission, and all the other time slots are used for transport service, as shown in Figure 9.Transmission control time slot transmits 640 * 96 Bit datas, and form as shown in figure 10.Wherein the SII adapter block is 1 system's direct packets, and the SCI adapter block is N=120 time slot controlling packet, and the PI adapter block is 519 additional information bags, and each bag is 96 bits.
Wherein, the SII adapter block comprises 6 territories, is respectively: 13 bits area call number territory LID, 3 bit pilot frequency mode territory PM, 16 bit version territory VER, the 32 territory DATA-TIME of bit length of a game, 20 bits keep territory RSV, 12 bit verification territory CRC.
The territorial scope of call number territory, area LID indication mechanism service, with the combination of pilot frequency mode territory, 65536 ground of maximum support area definitions.The function of all the other each subdomains as mentioned above.
Each time slot controlling packet of SCI adapter block is made up of 96 bits, comprises 3 territories, is respectively 28 bit transfer pattern description territory STrD, 56 bit types of service are described territory STyD and 12 bit verification territory CRC.Wherein transmission mode is described the territory and is made up of 7 subdomains: 3 bit frequency index territory FREQ, 4 bit sliced index territory FID, 6 bit time slots index territory TSID, 1 bit transfer make energy gap ACT, 5 bits of encoded mode field CM, 4 Bit Interleave mode field IM, 5 bit modulation mode field MM; Type of service is described the territory and is made up of 5 bit type index territory TYPE, 3 bit priority levels indication territory PRI, the professional index territory SVID of 10 bits, 38 bit type descriptor DESCRIPTOR.Each territory is defined as follows table 1 to shown in the table 7.
Table 1 frequency index territory FREQ
| FREQ | The frequency index |
| 0x00 | |
| 0x01 | |
| 0x02 | Frequency 2 |
| 0x03～0x07 | Keep |
Table 2 time slot index territory TSID
| TSID | The time slot index |
| 0x00≤N≤0x27 | Time slot N |
| 0x028～0x3F | Keep |
Table 3 time slot makes energy gap ACT
| ACT | Time slot enables |
| 1 | Transmitted |
| 0 | Transmitted power not |
Table 4 chnnel coding pattern
| CM | Coding mode |
| 0x00 | |
| 0x01 | ISN code check 5/8, outer sign indicating number RS (90,80) |
| 0x02 | |
| 0x03 | ISN code check 5/8, outer sign indicating number RS (90,90) |
| 0x04～0x1F | Keep |
Table 5 interleaver mode
| IM | Interleaver mode |
| 0x00 | K＝1 |
| 0x01 | K＝2 |
| 0x02 | K＝4 |
| 0x03 | K＝8 |
| 0x04～0x0F | Keep |
Table 6 subcarrier-modulated mode field MM
| MM | Modulating mode |
| 0x00 | BPSK |
| 0x01 | QPSK |
| 0x02 | 16QAM |
| 0x03～0x1F | Keep |
Table 7 type of service territory TYPE
| TYPE | Type of service |
| 0x00 | TS class business |
| 0x01 | IP class business |
| 0x02～0x1F | Keep |
The descriptor of TS class business is 13 bit MAX_PID, and 13 bit MIN_PID and 16 bit RSV keep, and wherein MAX_PID is the maximum PID in this TS stream; MIN_PID is the minimum PID in this TS stream; RSV is a reservation bit.
Whole reservations of the descriptor of IP class business are changed to complete " 0 ".
The additional information block movement be the public information (Public Information) of system definition.Public information is divided into the information frame of random length, and its structure as shown in figure 11.
Wherein, SYNC is 8 bit sync word territories.Be made as ' 10111001 '.
AID is 16 bit regions call number territories, span 0 to 65536.PIID is 10 bit public information call number territories, span 0 to 4095.
PITy is 8 bit public information type field.The public information PIID independent numbering of each type.See Table 8.
Table 8 public information type
| PITy | The public information type |
| 0x0 | Emergence message |
| 0x1 | Indication information |
| 0x2～0xF | Keep |
IVT is 12 bit fails time-domains.After this territory indication receives this public information, the duration that this information remains valid.The chronomere in IVT territory is specified by the TU territory.
TU is 2 bit chronomere territories.Definition sees Table 9.
Table 9 chronomere
| TU | Chronomere |
| 0x0 | Second |
| 0x1 | Divide and plant |
| 0x2 | Hour |
| 0x3 | Day |
LEN is 16 bit information length field.The byte number in designation data territory.
DATA is a data field.Define this length of field by the LEN territory.
RSV is changed to " 0000 " for keeping the territory.
The CRC check multinomial is g (x)=x12+x11+x3+x2+x+1, and the generation method as shown in Figure 8.Register is reset to " 0 " state entirely before importing each time slot controlling packet.
The public information frame is split into the additional information bag of several 96 bits, and postamble less than 96 bits are then used " 0 " filling entirely, as shown in figure 12.
The present invention is not limited to above-mentioned specific embodiment, is not deviating under spirit of the present invention and the real situation thereof, and those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention.These corresponding changes and distortion all should belong within the protection range of claims of the present invention.
Claims (13)
1, a kind of dispensing device of digit broadcasting system control information transmission comprises:
Traffic data channel coding and interleaving treatment unit, it is used for the multiple business data are carried out chnnel coding and interlace operation;
Control information chnnel coding and interleaving treatment unit, it is used for chnnel coding and interlace operation are carried out in control information;
The framing unit, it is used for carrying out the framing operation through described multiple business data behind chnnel coding and the interlace operation and control information; And
The OFDM modulating unit, it is used for being modulated to baseband signal to carrying out OFDM through the data after the framing operation;
It is characterized in that be divided into several slots through each frame after the framing cell processing, control information takies one or several time slots of appointment, other time slot of multiple business data occupancy; And the data format of control time slot is for comprising: system's bootstrap block, time slot controll block and additional information piece; And control information sends to each described unit simultaneously, is used in reference to be shown in the operation that each described unit is finished in each time slot.
2, dispensing device as claimed in claim 1, it is characterized in that, described additional information piece is used for the public information of transmission system definition, this public information is divided into the information frame of random length, and it comprises synchronization character territory, public information call number territory, region index territory, public information type field, out-of-service time territory, chronomere territory, message length territory, data field, reservation territory and verification territory.
3, dispensing device as claimed in claim 1, it is characterized in that, described system bootstrap block is used to indicate system information, it is made up of 6 territories, that is: be used to indicate the territorial scope of system service regional call number territory, be used to indicate the pilot frequency mode that ofdm signal adopts the pilot frequency mode territory, be used to indicate system version number the version number territory, be used to indicate the Greenwich Mean Time at current time slots place the length of a game territory, keep territory and verification territory.
4, dispensing device as claimed in claim 1, it is characterized in that, the described time slot controll block of each time slot has comprised the physical parameter of this time slot and the business information of transmission, and it is made up of 3 territories, that is: transmission mode is described the territory, type of service is described territory and verification territory.
5, dispensing device as claimed in claim 4 is characterized in that, described transmission mode is described the territory and is made up of 7 subdomains: frequency index territory, burst index territory, time slot index territory, transmission make energy gap, coding mode territory, interlace mode territory and modulating mode territory.
6, dispensing device as claimed in claim 5, it is characterized in that, when one of the using system appointment or several control time slots, what the control time slot adopted is by system's specified coding pattern, interlace mode and modulating mode in described coding mode territory, interlace mode territory and the modulating mode territory.
7, dispensing device as claimed in claim 6 is characterized in that, when the control time slot that uses more than system's appointment, the system of each control coding mode, interlace mode and modulating mode that time slot adopted specifies can be different.
8, dispensing device as claimed in claim 4 is characterized in that, described type of service is described the territory and is made up of types index territory, priority indication territory, professional index territory and type specification symbol territory.
As any described dispensing device in the claim 2～4, it is characterized in that 9, CRC check is adopted in described verification territory.
10, as any described dispensing device in the claim 2～5,8, it is characterized in that the byte number in various described territories is according to the requirements definition of system.
11, a kind of sending method of digit broadcasting system control information transmission comprises:
The multiple business data of input are carried out the step of chnnel coding and interlace operation;
The control information of input is carried out the step of chnnel coding and interlace operation;
To carrying out the step that framing is operated through described multiple business data behind chnnel coding and the interlace operation and control information; And
To carrying out the step that OFDM is modulated to baseband signal through the data after the framing operation;
It is characterized in that be divided into several slots through each frame after the framing cell processing, control information takies one or several time slots of appointment, other time slot of multiple business data occupancy; And the data format of control time slot is for comprising: system's bootstrap block, time slot controll block and additional information piece; Reach control information and send to each unit simultaneously, be used in reference to the step that is shown in the operation that each unit is finished in each time slot.
12, a kind of receiving system of digit broadcasting system control information transmission comprises:
The OFDM demodulation unit, it is used for baseband signal is carried out demodulation;
Separate frame unit, it is used for the data after the demodulation process are separated the frame operation, and outgoing traffic time slot and control time slot;
Business time-slot channel-decoding and deinterleaving processing unit, it is used for the business time-slot of output is carried out channel-decoding and deinterleaving operation; And
Control time slot channel-decoding and deinterleaving processing unit, it is used for the control time slot is carried out channel-decoding and deinterleaving operation;
It is characterized in that each frame of the data after handling through described receiving system is divided into several slots, the control information of recovery takies one or several time slots of appointment, other time slot of multiple business data occupancy; And the data format of control time slot is for comprising: system's bootstrap block, time slot controll block and additional information piece; And the control information that recovers sends to each described unit simultaneously, is used in reference to be shown in the operation that each described unit is finished in the business time-slot.
13, a kind of method of reseptance of digit broadcasting system control information transmission comprises:
Baseband signal is carried out the step of demodulation operation;
The later data of demodulation operation are separated the frame operation, and the step of outgoing traffic time slot and control time slot;
The business time-slot of output is carried out the step of channel-decoding and deinterleaving operation; And
The control time slot of output is carried out the step of channel-decoding and deinterleaving operation;
It is characterized in that each frame of the data after handling through receiving system is divided into several slots, the control information of recovery takies one or several time slots of appointment, other time slot of multiple business data occupancy; And the data format of control time slot is for comprising: system's bootstrap block, time slot controll block and additional information piece;
The control information that recovers sends to each unit simultaneously, is used in reference to the step that is shown in the operation that each unit is finished in the business time-slot.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100890649A CN100525145C (en) | 2006-08-01 | 2006-08-01 | Device and method for transferring control information in digital broadcast system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100890649A CN100525145C (en) | 2006-08-01 | 2006-08-01 | Device and method for transferring control information in digital broadcast system |
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| Publication Number | Publication Date |
|---|---|
| CN1960212A true CN1960212A (en) | 2007-05-09 |
| CN100525145C CN100525145C (en) | 2009-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100890649A Expired - Fee Related CN100525145C (en) | 2006-08-01 | 2006-08-01 | Device and method for transferring control information in digital broadcast system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101904149A (en) * | 2007-07-05 | 2010-12-01 | 相干逻辑公司 | Mobile television broadcast system |
| 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 |
| CN104702376A (en) * | 2009-07-29 | 2015-06-10 | 马维尔国际贸易有限公司 | Methods and apparatus for WLAN transmission |
| US10666998B2 (en) | 2007-07-05 | 2020-05-26 | Coherent Logix, Incorporated | Generating control information for use in transmission with a multimedia stream to an audiovisual device |
| US10848811B2 (en) | 2007-07-05 | 2020-11-24 | Coherent Logix, Incorporated | Control information for a wirelessly-transmitted data stream |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7221917B2 (en) * | 2002-05-01 | 2007-05-22 | Ibiquity Digital Corporation | Adjacent channel interference mitigation for FM digital audio broadcasting receivers |
| KR100804651B1 (en) * | 2004-02-13 | 2008-02-20 | 포스데이타 주식회사 | Method and apparatus for multi-carrier communication systems with adaptive transmission and feedback |
| JP4828906B2 (en) * | 2004-10-06 | 2011-11-30 | 三星電子株式会社 | Providing and receiving video service in digital audio broadcasting, and apparatus therefor |
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2006
- 2006-08-01 CN CNB2006100890649A patent/CN100525145C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101904149A (en) * | 2007-07-05 | 2010-12-01 | 相干逻辑公司 | Mobile television broadcast system |
| CN101904149B (en) * | 2007-07-05 | 2015-09-09 | 相干逻辑公司 | For receiving and present the method, apparatus and system of audiovisual streams on the mobile apparatus |
| US10666998B2 (en) | 2007-07-05 | 2020-05-26 | Coherent Logix, Incorporated | Generating control information for use in transmission with a multimedia stream to an audiovisual device |
| US10848811B2 (en) | 2007-07-05 | 2020-11-24 | Coherent Logix, Incorporated | Control information for a wirelessly-transmitted data stream |
| US11206437B2 (en) | 2007-07-05 | 2021-12-21 | Coherent Logix, Incorporated | Control information for a wirelessly-transmitted data stream |
| US11671642B2 (en) | 2007-07-05 | 2023-06-06 | Coherent Logix, Incorporated | Control information for a wirelessly-transmitted data stream |
| CN104702376A (en) * | 2009-07-29 | 2015-06-10 | 马维尔国际贸易有限公司 | Methods and apparatus for WLAN transmission |
| US10003432B2 (en) | 2009-07-29 | 2018-06-19 | Marvell World Trade Ltd. | Methods and apparatus for WLAN transmission |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN100525145C (en) | 2009-08-05 |
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