CN1172530C - Data mapping method in digital TV transmiision - Google Patents
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- CN1172530C CN1172530C CNB031151272A CN03115127A CN1172530C CN 1172530 C CN1172530 C CN 1172530C CN B031151272 A CNB031151272 A CN B031151272A CN 03115127 A CN03115127 A CN 03115127A CN 1172530 C CN1172530 C CN 1172530C
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Abstract
The present invention discloses a data mapping method in digital TV transmission, in which a two-dimension gray code mapping method is widely used. Via modulation modes of QPSK, 16QAM, 32QAM, 64QAM, 128QAM and 256QAM, every continuous M bytes from an interleaver are divided into serial 8 M/N groups based on N bits for a group and are mapped to data marks. A QPSK modulation mode is applied for synchronous signals: 0 corresponds to the level +9 and 1 corresponds to the level-9. The method can be used for obtain a low bit error rate so as to increase the interference rejection of a transmission system.
Description
Technical field
The invention belongs to digital signal transmission field, particularly the method for shining upon before the transfer of data in the digital television transfer.
Background technology
Typical digital transmission system comprises transmitter and receiver.Digital modulation technique adds necessary supplementary more often with encoding digital signals, as: synchronizing signal, pilot signal etc.Digital signal behind the coding forms baseband signal through behind the channel filtering.This baseband signal sends after being modulated onto frequency band corresponding through upconverter.At receiving terminal, tuner transforms to base band after analog to digital converter obtains digital signal with high-frequency signal.This digital signal is resumed the information consistent with transmitting terminal after treatment.
Usually adopt the transmission system of trellis coded modulation at present, as U.S. ATSC standard and European DVB standard, its mapping mode is fixed, and this differentiation to receiving end is unfavorable, has increased RS decoding bit error rate afterwards, causes systematic function to reduce.
Summary of the invention
The objective of the invention is for different transmission modes designs corresponding data map mode, help to reduce decoding bit error rate afterwards, improve the antijamming capability of transmission system.
Data mapping method of the present invention is in QPSK, 16QAM, 32QAM, 64QAM, 128QAM and 256QAM modulation system, to become bit stream from every continuous N byte conversion of interleaver, a byte high position becomes the 8M/N group of serial to be mapped to data symbol according to N bit one component the 8M bit preceding during conversion.Synchronizing signal adopts the QPSK modulation system.Adopt two-dimentional Gray code mapping in QPSK, 16QAM, 64QAM and 256QAM modulation system, promptly the preceding N/2 bit of N bit is mapped to the I road with Gray code, and back N/2 bit is mapped to the Q road with Gray code.Use the two-dimentional Gray code mapping of revising in 32QAM and the 128QAM modulation system.The I road after mapping under QPSK, 16QAM, 32QAM, 64QAM, 128QAM and the 256QAM modulating mode and the minimum value of Q road amplitude are used C respectively
1, C
2, C
3, C
4, C
5, C
6Expression, the average symbol power of various modulating modes is equal, promptly
C
1 2＝(C
2 2+9C
2 2)/2
＝(3C
3 2+27C
3 2+75C
3 2-20C
3 2)/8
＝(C
4 2+9C
4 2+25C
4 2+49C
4 2)/4
＝(3C
5 2+27C
5 2+75C
5 2+147C
5 2+162C
5 2+363C
5 2-121C
5 2)/16
=(C
6 2+ 9C
6 2+ 25C
6 2+ 49C
6 2+ 81C
6 2+ 121C
6 2+ 169C
6 2+ 225C
6 2)/8; Under the data bit width condition of limited, C
1, C
2, C
3, C
4, C
5, C
6Value need guarantee that the average symbol power of each modulation system is close, promptly
C
1 2≈(C
2 2+9C
2 2)/2
≈(3C
3 2+27C
3 2+75C
3 2-20C
3 2)/8
≈(C
4 2+9C
4 2+25C
4 2+49C
4 2)/4
≈(3C
5 2+27C
5 2+75C
5 2+147C
5 2+162C
5 2+363C
5 2-121C
5 2)/16
≈(C
6 2+9C
6 2+25C
6 2+49C
6 2+81C
6 2+121C
6 2+169C
6 2+225C
6 2)/8。
The mapping of QPSK modulation system, the M value is 1, and preceding 1 bit that the N value is 2,2 Bit datas is the I road, and back 1 bit is the Q road; After mapping, I, Q road signal be corresponding 2 level respectively, 0 corresponding level+C
1, 1 corresponding level-C
1
The mapping of 16QAM modulation system, M value are 1, and the N value is that preceding 2 bits of 4,4 Bit datas are mapped to the I road with Gray code, and back 2 bits are mapped to the Q road with Gray code; After mapping, I, Q road signal be corresponding 4 level respectively, 00 corresponding level+3C
2, 01 corresponding level+C
2, 11 corresponding level-C
2, 10 corresponding level-3C
2
The 32QAM modulation system is used the two-dimentional Gray code mapping of revising, and the M value is 5, and the N value is 5, signal X
1X
2X
3X
4X
5Each 6 level through the corresponding I in mapping back, Q road; Work as X
5=0 o'clock, X
1X
2Be mapped to the I road, X
3X
4Be mapped to the Q road, i.e. X
1X
2X
3X
4Be the two-dimentional Gray code of 16 constellation point, 00 corresponding level+3C
3, 01 corresponding level+C
3, 11 corresponding level-C
3, 10 corresponding level-3C
3Work as X
5=1 o'clock, mapping mode was by X
5The planisphere of=0 o'clock two-dimentional Gray code generates to expansion all around under the minimum prerequisite of the average number that adjacent two constellation point bits change; Work as X
4=0 o'clock, if X
3=0, the corresponding level+5C in Q road then
3, if X
3=1, the corresponding level-5C in Q road then
3, the mapping on I road is by X
1X
2Decision is with X
5=0 o'clock identical, works as X
4=1 o'clock, if X
1=0, the corresponding level+5C in I road then
3, if X
1=1, the corresponding level-5C in I road then
3, the mapping on Q road is by X
2X
3Decision, 10 corresponding level+3C
3, 00 corresponding level+C
3, 01 corresponding level-C
3, 11 corresponding level-3C
3
The mapping of 64QAM modulation system, M value are 3, and the N value is that preceding 3 bits of 6,6 Bit datas are mapped to the I road with Gray code, and back 3 bits are mapped to the Q road with Gray code; After mapping, I, Q road signal be corresponding 8 level respectively, 000 corresponding level+7C
4, 001 corresponding level+5C
4, 011 corresponding level+3C
4, 010 corresponding level+C
4, 110 corresponding level-C
4, 111 corresponding level-3C
4, 101 corresponding level-5C
4, 100 corresponding level-7C
4
The 128QAM modulation system is used the two-dimentional Gray code mapping of revising, and the M value is 7, and the N value is 7, signal X
1X
2X
3X
4X
5X
6X
7Each 12 level through the corresponding I in mapping back, Q road; Work as X
7=0 o'clock, X
1X
2X
3Be mapped to the I road, X
4X
5X
6Be mapped to the Q road, i.e. X
1X
2X
3X
4X
5X
6Be the two-dimentional Gray code of 64 constellation point, 000 corresponding level+7C
5, 001 corresponding level+5C
5, 011 corresponding level+3C
5, 010 corresponding level+C
5, 110 corresponding level-C
5, 111 corresponding level-3C
5, 101 corresponding level-5C
5, 100 corresponding level-7C
5Work as X
7=1 o'clock, mapping mode was by X
7The planisphere of=0 o'clock two-dimentional Gray code generates to expansion all around under the minimum prerequisite of the average number that adjacent two constellation point bits change; Work as X
5=0 o'clock, if X
4X
6=01, then the Q road corresponds to level+11C
5, if X
4X
6=00, then the Q road corresponds to level+9C
5, if X
4X
6=10, then the Q road corresponds to level-9C
5, if X
4X
6=11, then the Q road corresponds to level-11C
5, the mapping on I road is by X
1X
2X
3Decision is with X
7=0 o'clock identical, works as X
5=1 o'clock, if X
1X
3=01, then the I road corresponds to level+11C
5, if X
1X
3=00, then the I road corresponds to level+9C
5, if X
1X
3=10, then the I road corresponds to level-9C
5, if X
1X
3=11, then the I road corresponds to level-11C
5, the mapping on Q road is by X
2X
4X
6Decision, 100 corresponding level+7C
5, 101 corresponding level+5C
5, 001 corresponding level+3C
5, 000 corresponding level+C
5, 010 corresponding level-C
5, 011 corresponding level-3C
5, 111 corresponding level-5C
5, 110 corresponding level-7C
5
The mapping of 256QAM modulation system, M value are 1, and preceding 4 bits that the N value is 8,8 Bit datas are mapped to the I road with Gray code, and back 4 bits are mapped to the Q road with Gray code; After mapping, I, Q road signal be corresponding 16 level respectively, 0000 corresponding level+15C
6, 0001 corresponding level+13C
6, 0011 corresponding level+11C
6, 0010 corresponding level+9C
6, 0110 corresponding level+7C
5, 0111 corresponding level+5C
6, 0101 corresponding level+3C
6, 0100 corresponding level+C
6, 1100 corresponding level-C
6, 1101 corresponding level-3C
6, 1111 corresponding level-5C
6, 1110 corresponding level-7C
6, 1010 corresponding level-9C
6, 1011 corresponding level-11C
6, 1001 corresponding level-13C
6, 1000 corresponding level-15C
6
In digital television broadcasting system, adopt this two dimension Gray code mapping mode, Euclidean distance after making the preceding Hamming distance of mapping and shining upon farthest is mapped, when error code in its RS piece can't be all corrected in RS decoding, can obtain lower bit error rate.Transmit high data pattern for some especially, adopt two-dimentional Gray code mapping meeting and the byte number that produces mistake is significantly reduced, thereby improved the antijamming capability of transmission system than adopting common fixedly mapping.The close influence that can reduce the switching of modulation system of the average symbol power of various modulation systems to the control of receiver automatic gain.
Description of drawings
Fig. 1 is the transmission system block diagram;
Fig. 2 A is that the QPSK mapping is converted to I, Q two dimension planisphere;
Mapping when Fig. 2 B is the QPSK modulation from the byte to the symbol;
Fig. 3 A is that the 16QAM mapping is converted to I, Q two dimension planisphere;
Mapping when Fig. 3 B is the 16QAM modulation from the byte to the symbol;
Fig. 3 C is a 16QAM two dimension Gray code mapping schematic diagram;
Fig. 4 A is that the 32QAM mapping is converted to I, Q two dimension planisphere;
Mapping when Fig. 4 B is the 32QAM modulation from the byte to the symbol;
Fig. 5 A is a 64QAM two dimension Gray code mapping schematic diagram;
Mapping when Fig. 5 B is the 64QAM modulation from the byte to the symbol;
Fig. 6 A is that the 128QAM mapping is converted to I, Q two dimension planisphere;
Mapping when Fig. 6 B is the 128QAM modulation from the byte to the symbol;
Fig. 7 A is a 256QAM two dimension Gray code mapping schematic diagram;
Mapping when Fig. 7 B is the 256QAM modulation from the byte to the symbol.
Embodiment
As shown in Figure 1, the business datum of input through buffering after, carry out scrambler, RS encode, interweaves, shine upon, the data after the mapping are inserted synchronizing information by MUX MUX, carry out the QAM modulation then, after IF export after amplifying.Wherein the collaborative work of whole system is finished by control unit.In QPSK, 16QAM, 32QAM, 64QAM, 128QAM and 256QAM transmission system, will become the 8M/N group of serial to be mapped to data symbol according to N bit one component from every continuous N byte of interleaver.Data are represented with 6 bits, for differing minimum between the average symbol power that makes the different modulating mode, get C
1=9; C
2=4; C
3=3; C
4=2; C
5=1.5; C
6=1.As can be seen
P
1＝9
2＝81
P
2＝5×4
2＝80
P
3＝10×3
2＝90
P
4＝21×2
2＝84
P
5＝41×1.5
2＝92.25
P
6＝85×1
2＝85
As can be seen, under the data bit width condition of limited, the average symbol power of various modulation systems has been accomplished approaching.In Project Realization, last example can obtain effect preferably.Certainly, can make the average symbol power of various modulation systems further approaching by changing data bit width.
Synchronizing signal adopts the mapping of 2 level, 0 corresponding level+9,1 corresponding level-9, and the fractionation of mapping byte is a starting point with first bit of every group of data, mapping mode all adopts two-dimentional Gray code mapping.
Shown in Fig. 2 A and 2B, the mapping of the QPSK modulation system in this method, preceding 1 bit of 2 Bit datas is I, back 1 bit is Q; The M value is 1, and the N value is 2, and after mapping, I, Q road signal be corresponding 2 level respectively, 0 corresponding level+9,1 corresponding level-9.
Shown in Fig. 3 A, 3B and 3C, the mapping of the 16QAM modulation system in this method, preceding 2 bits of 4 Bit datas are mapped to I with Gray code, and back 2 bits are mapped to Q with Gray code; The M value is 1, and the N value is 4, and after mapping, I, Q road signal be corresponding 4 level respectively, the corresponding level in 00 corresponding level+12,01+4,11 corresponding level-4,10 corresponding level-12.With 0001 constellation point is example, and preceding dibit 00 is the I road, corresponding level+12, and back dibit 01 is the Q road, corresponding level+4, other constellation point is by this rule mapping.
Shown in Fig. 4 A and 4B, the mapping of the 32QAM modulation system in this method, the M value is 5, the N value is 5, signal X
1X
2X
3X
4X
5Each 6 level through the corresponding I in mapping back, Q road; Work as X
5=0 o'clock, X
1X
2Be mapped to the I road, X
3X
4Be mapped to the Q road, the corresponding level in 00 corresponding level+9,01+3,11 corresponding level-3,10 corresponding level-9; Work as X
5=1 o'clock, mapping mode was by X
5=0 o'clock mapping mode generates, and works as X
4=0 o'clock, if X
3=0, if the corresponding level in Q road+15 then are X
3=1, the corresponding level-15 in Q road then, the mapping on I road is by X
1X
2Decision is with X
5=0 o'clock identical, works as X
4=1 o'clock, if X
1=0, if the corresponding level in I road+15 then are X
1=1, the corresponding level-15 in I road then, the mapping on Q road is by X
2X
3Decision, the corresponding level in 10 corresponding level+9,00+3,01 corresponding level-3,11 corresponding level-9.
Shown in Fig. 5 A and 5B, the mapping of the 64QAM modulation system in this method, preceding 3 bits of 6 Bit datas are mapped to I with Gray code, and back 3 bits are mapped to Q with Gray code; The M value is 3, and the N value is 6, and after mapping, I, Q road signal be corresponding 8 level respectively, the corresponding level in 000 corresponding level+14, the 001+corresponding level in 10,011 corresponding level+6,010+2,110 corresponding level-2,111 corresponding level-6,101 corresponding level-10,100 corresponding level-14.The mapping method of constellation point is referring to 16QAM.
Shown in Fig. 6 A and 6B, the mapping of the 128QAM modulation system in this method, the M value is 7, the N value is 7, signal X
1X
2X
3X
4X
5X
6X
7Each 12 level through the corresponding I in mapping back, Q road; Work as X
7=0 o'clock, X
1X
2X
3Be mapped to the I road, X
4X
5X
6Be mapped to the Q road, the corresponding level in 000 corresponding level+10.5, the 001+corresponding level in 7.5,011 corresponding level+4.5,010+1.5,110 corresponding level-1.5,111 corresponding level-4.5,101 corresponding level-7.5,100 corresponding level-10.5; Work as X
7=1 o'clock, mapping mode was by X
7=0 o'clock mapping mode generates, and works as X
5=0 o'clock, if X
4X
6=01, then the Q road corresponds to level+16.5, if X
4X
6=00, then the Q road corresponds to level+13.5, if X
4X
6=10, then the Q road corresponds to level-13.5, if X
4X
5=11, then the Q road corresponds to level-16.5, and the mapping on I road is by X
1X
2X
3Decision is with X
7=0 o'clock identical, works as X
5=1 o'clock, if X
1X
3=01, then the I road corresponds to level+16.5, if X
1X
3=00, then the I road corresponds to level+13.5, if X
1X
3=10, then the I road corresponds to level-13.5, if X
1X
3=11, then the I road corresponds to level-16.5, and the mapping on Q road is by X
2X
4X
6Decision, the corresponding level in 100 corresponding level+10.5, the 101+corresponding level in 7.5,001 corresponding level+4.5,000+1.5,010 corresponding level-1.5,011 corresponding level-4.5,111 corresponding level-7.5,110 corresponding level-10.5.
Shown in Fig. 7 A and 7B, the mapping of the 256QAM modulation system in this method, preceding 4 bits of 8 Bit datas are mapped to I with Gray code, and back 4 bits are mapped to Q with Gray code; The M value is 1, the N value is 8, and after mapping, I, Q road signal be corresponding 16 level respectively, 0000 corresponding level+15, the corresponding level in 0001 corresponding level+13,0011+11,0010 corresponding level+9,0110 corresponding level+7, the corresponding level in 0111 corresponding level+5,0101+3,0100 corresponding level+1,1100 corresponding level-1,1101 corresponding level-3,1111 corresponding level-5,1110 corresponding level-7,1010 corresponding level-9,1011 corresponding level-11,1001 corresponding level-13,1000 corresponding level-15.The mapping method of constellation point is referring to 16QAM.
Claims (7)
1. the data mapping method in the digital television transfer, it is characterized in that: in QPSK, 16QAM, 32QAM, 64QAM, 128QAM and 256QAM modulation system, to become bit stream from every continuous N byte conversion of interleaver, a byte high position becomes the 8M/N group of serial to be mapped to data symbol according to N bit one component the 8M bit preceding during conversion; Synchronizing signal adopts the QPSK modulation system; Adopt two-dimentional Gray code mapping in QPSK, 16QAM, 64QAM and 256QAM modulation system, promptly the preceding N/2 bit of N bit is mapped to the I road with Gray code, and back N/2 bit is mapped to the Q road with Gray code; Use the two-dimentional Gray code mapping of revising in 32QAM and the 128QAM modulation system; The I road after mapping under QPSK, 16QAM, 32QAM, 64QAM, 128QAM and the 256QAM modulating mode and the minimum value of Q road amplitude are used C respectively
1, C
2, C
3, C
4, C
5, C
6Expression, the average symbol power of various modulating modes is equal, promptly
C
1 2＝(C
2 2+9C
2 2)/2
＝(3C
3 2+27C
3 2+75C
3 2-20C
3 2)/8
＝(C
4 2+9C
4 2+25C
4 2+49C
4 2)/4
＝(3C
5 2+27C
5 2+75C
5 2+147C
5 2+162C
5 2+363C
5 2-121C
5 2)/16
=(C
6 2+ 9C
6 2+ 25C
6 2+ 49C
6 2+ 81C
6 2+ 121C
6 2+ 169C
6 2+ 225C
6 2)/8; Under the data bit width condition of limited, C
1, C
2, C
3, C
4, C
5, C
6Value need guarantee that the average symbol power of each modulation system is close, promptly
C
1 2≈(C
2 2+9C
2 2)/2
≈(3C
3 2+27C
3 2+75C
3 2-20C
3 2)/8
≈(C
4 2+9C
4 2+25C
4 2+49C
4 2)/4
≈(3C
5 2+27C
5 2+75C
5 2+147C
5 2+162C
5 2+363C
5 2-121C
5 2)/16
≈(C
6 2+9C
6 2+25C
6 2+49C
6 2+81C
6 2+121C
6 2+169C
6 2+225C
6 2)/8。
2. data mapping method as claimed in claim 1 is characterized in that: the mapping of described QPSK modulation system, and the M value is 1, and preceding 1 bit that the N value is 2,2 Bit datas is the I road, and back 1 bit is the Q road; After mapping, I, Q road signal be corresponding 2 level respectively, 0 corresponding level+C
1, 1 corresponding level-C
1
3. data mapping method as claimed in claim 1 is characterized in that: the mapping of described 16QAM modulation system, M value are 1, and the N value is that preceding 2 bits of 4,4 Bit datas are mapped to the I road with Gray code, and back 2 bits are mapped to the Q road with Gray code; After mapping, I, Q road signal be corresponding 4 level respectively, 00 corresponding level+3C
2, 01 corresponding level+C
2, 11 corresponding level-C
2, 10 corresponding level-3C
2
4. data mapping method as claimed in claim 1 is characterized in that: described 32QAM modulation system is used the two-dimentional Gray code mapping of revising, and the M value is 5, and the N value is 5, signal X
1X
2X
3X
4X
5Each 6 level through the corresponding I in mapping back, Q road; Work as X
2=0 o'clock, X
1X
2Be mapped to the I road, X
3X
4Be mapped to the Q road, i.e. X
1X
2X
3X
4Be the two-dimentional Gray code of 16 constellation point, 00 corresponding level+3C
3, 01 corresponding level+C
3, 11 corresponding level-C
3, 10 corresponding level-3C
3Work as X
5=1 o'clock, mapping mode was by X
5The planisphere of=0 o'clock two-dimentional Gray code generates to expansion all around under the minimum prerequisite of the average number that adjacent two constellation point bits change; Work as X
4=0 o'clock, if X
3=0, the corresponding level+5C in Q road then
3, if X
3=1, the corresponding level-5C in Q road then
3, the mapping on I road is by X
1X
2Decision is with X
5=0 o'clock identical, works as X
4=1 o'clock, if X
1=0, the corresponding level+5C in I road then
3, if X
1=1, the corresponding level-5C in I road then
3, the mapping on Q road is by X
2X
3Decision, 10 corresponding level+3C
3, 00 corresponding level+C
3, 01 corresponding level-C
3, 11 corresponding level-3C
3
5. data mapping method as claimed in claim 1 is characterized in that: the mapping of described 64QAM modulation system, M value are 3, and the N value is that preceding 3 bits of 6,6 Bit datas are mapped to the I road with Gray code, and back 3 bits are mapped to the Q road with Gray code; After mapping, I, Q road signal be corresponding 8 level respectively, 000 corresponding level+7C
4, 001 corresponding level+5C
4, 011 corresponding level+3C
4, 010 corresponding level+C
4, 110 corresponding level-C
4, 111 corresponding level-3C
4, 101 corresponding level-5C
4, 100 corresponding level-7C
4
6. data mapping method as claimed in claim 1 is characterized in that: described 128QAM modulation system is used the two-dimentional Gray code mapping of revising, and the M value is 7, and the N value is 7, signal X
1X
2X
3X
4X
5X
6X
7Each 12 level through the corresponding I in mapping back, Q road; Work as X
7=0 o'clock, X
1X
2X
3Be mapped to the I road, X
4X
5X
6Be mapped to the Q road, i.e. X
1X
2X
3X
4X
5X
6Be the two-dimentional Gray code of 64 constellation point, 000 corresponding level+7C
5, 001 corresponding level+5C
5, 011 corresponding level+3C
5, 010 corresponding level+C
5, 110 corresponding level-C
5, 111 corresponding level-3C
5, 101 corresponding level-5C
5, 100 corresponding level-7C
5Work as X
7=1 o'clock, mapping mode was by X
7The planisphere of=0 o'clock two-dimentional Gray code generates to expansion all around under the minimum prerequisite of the average number that adjacent two constellation point bits change; Work as X
5=0 o'clock, if X
4X
6=01, then the Q road corresponds to level+11C
5, if X
4X
6=00, then the Q road corresponds to level+9C
5, if X
4X
6=10, then the Q road corresponds to level-9C
5, if X
4X
6=11, then the Q road corresponds to level-11C
5, the mapping on I road is by X
1X
2X
3Decision is with X
7=0 o'clock identical, works as X
5=1 o'clock, if X
1X
3=01, then the I road corresponds to level+11C
5, if X
1X
3=00, then the I road corresponds to level+9C
5, if X
1X
3=10, then the I road corresponds to level-9C
5, if X
1X
3=11, then the I road corresponds to level-11C
5, the mapping on Q road is by X
2X
4X
6Decision, 100 corresponding level+7C
5, 101 corresponding level+5C
5, 001 corresponding level+3C
5, 000 corresponding level+C
5, 010 corresponding level-C
5, 011 corresponding level-3C
5, 111 corresponding level-5C
5, 110 corresponding level-7C
5
7. data mapping method as claimed in claim 1 is characterized in that: the mapping of described 256QAM modulation system, M value are 1, and preceding 4 bits that the N value is 8,8 Bit datas are mapped to the I road with Gray code, and back 4 bits are mapped to the Q road with Gray code; After mapping, I, Q road signal be corresponding 16 level respectively, 0000 corresponding level+15C
6, 0001 corresponding level+13C
6, 0011 corresponding level+11C
6, 0010 corresponding level+9C
6, 0110 corresponding level+7C
6, 0111 corresponding level+5C
6, 0101 corresponding level+3C
6, 0100 corresponding level+C
6, 1100 corresponding level-C
6, 1101 corresponding level-3C
6, 1111 corresponding level-5C
6, 1110 corresponding level-7C
6, 1010 corresponding level-9C
6, 1011 corresponding level-11C
6, 1001 corresponding level-13C
6, 1000 corresponding level-15C
6
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|---|---|---|---|
| CNB031151272A CN1172530C (en) | 2003-01-24 | 2003-01-24 | Data mapping method in digital TV transmiision |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031151272A CN1172530C (en) | 2003-01-24 | 2003-01-24 | Data mapping method in digital TV transmiision |
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|---|---|
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| CN1172530C true CN1172530C (en) | 2004-10-20 |
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Address after: Hangzhou City, Zhejiang Province, Xihu District Ancient Jade Road 20 zip code: 310027 Co-patentee after: Hangzhou National Chip Science & Technology Co., Ltd. Patentee after: Zhejiang University Address before: Hangzhou City, Zhejiang Province, Xihu District Ancient Jade Road 20 zip code: 310027 Co-patentee before: Hangzhou Guoxin Science & Technology Co., Ltd. Patentee before: Zhejiang University |
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