US 20050152446A1 - VSB communication system

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Abstract

A VSB communication system comprises a VSB transmission system and a VSB reception system. The VSB transmission system multiplexes a coded MPEG data and a coded supplemental data having a null sequence inserted therein, with required multiplexing information included in a field synchronization signal or in a supplemental data according to a number of the supplemental data packets being transmitted. The VSB reception system detects the required multiplexing information from the field synchronization signal or the supplemental data and decodes the multiplexed data by using the null sequence and the detected multiplexing information, as well as demultiplexes the multiplexed data into the MPEG data and the supplemental data.

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1-48. -48. (canceled)

49. A VSB field synchronizing signal segment for use in a VSB transmitter with a supplemental data coder and a VSB receiver with a supplemental data decoder, the VSB transmitter transmitting at least one data field containing a plurality of main and supplemental data segments, the field synchronizing signal segment comprising:
- a segment synchronizing symbol area;
  
  at least one training symbol area;
  
  a VSB mode symbol area;
  
  a precode symbol area; and
  
  a reserved area including multiplexing information indicating a number of the supplemental data segments in the data field.
- View Dependent Claims (50, 51)
- - 50. The VSB field synchronizing signal segment of claim 49, wherein positions of the supplemental data segments in the data field are based on the number of the supplemental data segments.
  - 51. The VSB field synchronizing signal segment of claim 49, wherein the segment synchronizing symbol area contains 4 symbols, a first training symbol area contains 511 symbols, a second training symbol area contains 62 symbols, a third training symbol area contains 63 symbols, the VSB mode symbol area contains 24 symbols, the precode symbol area contains 12 symbols, and the reserved area contains 92 symbols.

52. An enhanced VSB transmitter for transmitting main data and supplemental data, the enhanced VSB transmitter comprising:
- a VSB pre-processor for coding original supplemental data packets for first forward error correction (FEC) and enhancing the first FEC coded data packets by inserting a plurality of null bits into each packet;
  
  a first multiplexer for multiplexing the enhanced supplemental data packets with main data packets in a data field based on a number of the original supplemental data packets, the data field containing a plurality of main and supplemental data segments and a field synchronizing signal segment, the field synchronizing signal segment comprising a reserved area including multiplexing information which indicates the number of the original supplemental data packets;
  
  a VSB main processor for coding the multiplexed data packets for second forward error correction (FEC); and
  
  a data format converter for formatting the second FEC coded data packets for transmission and transmitting the formatted data packets to one or more VSB receivers.
- View Dependent Claims (53, 54)
- - 53. The enhanced VSB transmitter of claim 52, wherein the field synchronizing signal segment further comprises:
    - a segment synchronizing symbol area;
      
      at least one training area;
      
      a VSB mode symbol area; and
      
      a precode symbol area.
  - 54. The enhanced VSB transmitter of claim 52, wherein the positions of the supplemental data segments in the data field are expressed by the following equations:
    - $\begin{matrix} for 0 \leq P \leq 39; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 2 P - 1}; \\ for 40 \leq P \leq 78; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 2 P - 79}; \\ for 79 \leq P \leq 117; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 2 P - 157}; and \\ for 118 \leq P \leq 156; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 4, i = 0, 1, \dots, 2 P - 235}; \end{matrix}$ wherein “
      
      P”
      
      denotes a number of the original supplemental data packets, and “
      
      s”
      
      denotes a supplemental data segment position with respect to the field synchronizing signal segment within the data field.

55. A method of transmitting main data and supplemental data, the method comprising:
- coding original supplemental data packets for first forward error correction (FEC);
  
  enhancing the first FEC coded supplemental data packets by inserting a plurality of null bits into each coded packet;
  
  multiplexing the enhanced supplemental data packets and main data packets in a data field based on a number of the original supplemental data packets, the data field comprising a plurality of main and supplemental data segments and a field synchronizing signal segment, the field synchronizing signal segment comprising a reserved area including multiplexing information indicating the number of the original supplemental data packets;
  
  coding the multiplexed data packets for second forward error correction (FEC);
  
  formatting the second FEC coded multiplexed data packets for transmission; and
  
  transmitting the formatted data packets to one or more VSB receivers.
- View Dependent Claims (56, 57)
- - 56. The method of claim 55, wherein the field synchronizing signal segment further comprises:
    - a segment synchronizing symbol area;
      
      at least one training area;
      
      a VSB mode symbol area; and
      
      a precode symbol area.
  - 57. The method of claim 55, wherein the positions of the supplemental data segments in the data field is are expressed by the following equations:
    - $\begin{matrix} for 0 \leq P \leq 39; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 2 P - 1}; \\ for 40 \leq P \leq 78; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 2 P - 79}; \\ for 79 \leq P \leq 117; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 2 P - 157}; and \\ for 118 \leq P \leq 156; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 4, i = 0, 1, \dots, 2 P - 235}; \end{matrix}$ wherein “
      
      P”
      
      denotes a number of the original supplemental data packets, and “
      
      s”
      
      denotes a supplemental data segment position with respect to the field synchronizing signal segment within the data field.

58. An enhanced VSB receiver for receiving main data and supplemental data from a VSB transmitter, the enhanced VSB receiver comprising:
- a main VSB processor for receiving and decoding a data field comprising a plurality of multiplexed main and enhanced supplemental data segments and a field synchronizing signal segment, the field synchronizing signal segment comprising a reserved area which includes multiplexing information indicating a number of original supplemental data packets included in the data field;
  
  a multiplexing information detector for detecting the multiplexing information from the field synchronizing signal segment;
  
  a demultiplexer for demultiplexing the main data segments and the enhanced supplemental data segments from the data field using the detected multiplexing information; and
  
  a supplemental VSB processor for processing decoding the demultiplexed enhanced supplemental data segments to obtain the original supplemental data packets.
- View Dependent Claims (59, 60)
- - 59. The enhanced VSB receiver of claim 58, wherein the field synchronizing signal segment further comprises:
    - a segment synchronizing symbol area;
      
      at least one training area;
      
      a VSB mode symbol area; and
      
      a precode symbol area.
  - 60. The enhanced VSB receiver of claim 58, wherein the positions of the enhanced supplemental data segments included in the data field are expressed by the following equations:
    - $\begin{matrix} for 0 \leq P \leq 39; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 2 P - 1}; \\ for 40 \leq P \leq 78; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 2 P - 79}; \\ for 79 \leq P \leq 117; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 2 P - 157}; and \\ for 118 \leq P \leq 156; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 4, i = 0, 1, \dots, 2 P - 235}; \end{matrix}$ wherein “
      
      P”
      
      denotes the number of the original supplemental data packets, and “
      
      s”
      
      denotes a supplemental data segment position with respect to the field synchronizing signal segment within the data field.

61. A method of receiving main data and supplemental data from a VSB transmitter, the method comprising:
- receiving and decoding a data field comprising a plurality of multiplexed main and enhanced supplemental data segments and a field synchronizing signal segment, the field synchronizing signal segment comprising a reserved area which includes multiplexing information indicating a number of original supplemental data packets included in the data field;
  
  detecting the multiplexing information from the field synchronizing signal segment;
  
  demultiplexing main data packets and enhanced supplemental data packets from the data field using the detected multiplexing information; and
  
  coding the enhanced data packets to obtain the original supplemental data packets.
- View Dependent Claims (62, 63)
- - 62. The method of claim 61, wherein the field synchronizing signal segment further comprises:
    - a segment synchronizing symbol area;
      
      at least one training area;
      
      a VSB mode symbol area; and
      
      a precode symbol area.
  - 63. The method of claim 61, wherein a MAP the positions of the supplemental data segments included in the data field is are expressed by the following equations:
    - $\begin{matrix} for 0 \leq P \leq 39; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 2 P - 1}; \\ for 40 \leq P \leq 78; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 2 P - 79}; \\ for 79 \leq P \leq 117; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 2 P - 157}; and \\ for 118 \leq P \leq 156; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 4, i = 0, 1, \dots, 2 P - 235}; \end{matrix}$ wherein “
      
      P”
      
      denotes the number of the original supplemental data packets, and “
      
      s”
      
      denotes a supplemental data segment position with respect to the field synchronizing signal segment within the data field.

64. A VSB field synchronizing signal segment for use in a VSB transmitter with a supplemental data coder and a VSB receiver with a supplemental data decoder, the VSB transmitter transmitting at least one data field containing a plurality of main and supplemental data segments, the field synchronizing signal segment comprising:
- a first area for storing first information representing a number of the supplemental data segments included in a current data field; and
  
  a second area for storing second information to be used for determining a count down value indicating a next data field having a different number of supplemental data segments.
- View Dependent Claims (65, 66)
- - 65. The VSB field synchronizing signal segment of claim 64, wherein the first information occupies at least 8 bits, and the second information occupies at least 8 bits.
  - 66. The VSB field synchronizing signal segment of claim 64, further comprising:
    - a third area for storing the different number of the supplemental data packets included in the next data field.

67. An enhanced VSB transmitter for transmitting main data and supplemental data, the enhanced VSB transmitter comprising:
- a VSB pre-processor for coding original supplemental data packets for first forward error correction (FEC) and enhancing the first FEC coded data packets by inserting a plurality of null bits into each data packet;
  
  a multiplexer for multiplexing the enhanced supplemental data packets and main data packets in a data field based on a number of the original supplemental data packets, the data field containing a plurality of main and supplemental data segments and a field synchronizing signal segment, the field synchronizing signal segment comprising;
  
  a first area for storing first information representing the number of the original supplemental data packets; and
  
  a second area for storing second information to be used for determining a count down value indicating a next data field having a different number of original supplemental data packets;
  
  a VSB main processor for coding the multiplexed data packets for second forward error correction (FEC); and
  
  a data format converter for formatting the second FEC coded data packets for transmission and transmitting the formatted data packets to one or more VSB receivers.
- View Dependent Claims (68, 69)
- - 68. The enhanced VSB transmitter of claim 67, wherein the field synchronizing signal segment further comprises:
    - a third area for storing the different number of the original supplemental data packets included in the next data field.
  - 69. The enhanced VSB transmitter of claim 67, wherein the positions of the supplemental data segments in the data field are expressed by the following equations:
    - $\begin{matrix} for 0 \leq P \leq 39; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 2 P - 1}; \\ for 40 \leq P \leq 78; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 2 P - 79}; \\ for 79 \leq P \leq 117; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 2 P - 157}; and \\ for 118 \leq P \leq 156; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 4, i = 0, 1, \dots, 2 P - 235}; \end{matrix}$ wherein “
      
      P”
      
      denotes a number of the original supplemental data packets, and “
      
      s”
      
      denotes a supplemental data segment position with respect to the field synchronizing signal segment within the data field.

70. A method of transmitting main data and supplemental data, the method comprising:
- coding original supplemental data packets for first forward error correction (FEC) and enhancing the first FEC coded data packets by inserting a plurality of null bits into each packet;
  
  multiplexing the enhanced supplemental data packets and main data packets in a data field based on a number of the original supplemental data packets, the data field containing a plurality of main and supplemental data segments and a field synchronizing signal segment, the field synchronizing signal segment comprising;
  
  a first area for storing first information representing the number of the original supplemental data packets; and
  
  a second area for storing second information to be used for determining a count down value indicating a next data field having a different number of original supplemental data packets;
  
  coding the multiplexed data packets for second forward error correction (FEC); and
  
  formatting the second FEC coded data packets for transmission and transmitting the formatted data packets to one or more VSB receivers.
- View Dependent Claims (71, 72)
- - 71. The method of claim 70, wherein the field synchronizing signal segment further comprises:
    - a third area for storing the different number of the original supplemental data packets included in the next data field.
  - 72. The method of claim 70, wherein the positions of the supplemental data segments in the data field are expressed by the following equations:
    - $\begin{matrix} for 0 \leq P \leq 39; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 2 P - 1}; \\ for 40 \leq P \leq 78; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 2 P - 79}; \\ for 79 \leq P \leq 117; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 2 P - 157}; and \\ for 118 \leq P \leq 156; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 4, i = 0, 1, \dots, 2 P - 235}; \end{matrix}$ wherein “
      
      P”
      
      denotes a number of the original supplemental data packets, and “
      
      s”
      
      denotes a supplemental data segment position with respect to the field synchronizing signal segment within the data field.

73. An enhanced VSB receiver for receiving main and supplemental data from a VSB transmitter, the enhanced VSB receiver comprising:
- a main VSB processor for receiving and decoding a data field comprising a plurality of multiplexed main and enhanced supplemental data segments and a field synchronizing signal segment, the field synchronizing signal segment comprising;
  
  a first area for storing first information representing a number of original supplemental data packets included in the data field; and
  
  a second area for storing second information to be used for determining a count down value indicating a next data field having a different number of original supplemental data packets;
  
  a multiplexing information detector for detecting the first and second information from the field synchronizing signal segment;
  
  a demultiplexer for demultiplexing the main data segments and the enhanced supplemental data segments from the data field using the detected first and second information; and
  
  a supplemental VSB processor for processing decoding the demultiplexed enhanced data segments to obtain the original data packets.
- View Dependent Claims (74, 75)
- - 74. The enhanced VSB receiver of claim 73, wherein the field synchronizing signal segment further comprises:
    - a third area for storing the different number of the original supplemental data packets included in the next data field.
  - 75. The enhanced VSB receiver of claim 73, wherein the positions of the supplemental data segments in the data field are expressed by the following equations:
    - $\begin{matrix} for 0 \leq P \leq 39; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 2 P - 1}; \\ for 40 \leq P \leq 78; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 2 P - 79}; \\ for 79 \leq P \leq 117; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 2 P - 157}; and \\ for 118 \leq P \leq 156; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 4, i = 0, 1, \dots, 2 P - 235}; \end{matrix}$ wherein “
      
      P”
      
      denotes a number of the original supplemental data packets, and “
      
      s”
      
      denotes a supplemental data segment position with respect to the field synchronizing signal segment within the data field.

76. A method of receiving main and supplemental data from a VSB transmitter, the method comprising:
- receiving and decoding a data field comprising a plurality of multiplexed main and enhanced supplemental data segments and a field synchronizing signal segment, the field synchronizing signal segment comprising;
  
  a first area for storing first information representing a number of original supplemental data packets included in the data field; and
  
  a second area for storing second information to be used for determining a count down value indicating a next data field having a different number of original supplemental data packets;
  
  detecting the first and second information from the field synchronizing signal segment;
  
  demultiplexing the main data segments and the enhanced supplemental data segments from the data field using the detected first and second information; and
  
  processing the demultiplexed enhanced data segments to obtain the original data packets.
- View Dependent Claims (77, 78)
- - 77. The method of claim 76, wherein the field synchronizing signal segment further comprises:
    - a third area for storing the different number of the original supplemental data packets included in the next data field.
  - 78. The method of claim 76, wherein the positions of the supplemental data segments in the data field are expressed by the following equations:
    - $\begin{matrix} for 0 \leq P \leq 39; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 2 P - 1}; \\ for 40 \leq P \leq 78; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 2 P - 79}; \\ for 79 \leq P \leq 117; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 2 P - 157}; and \\ for 118 \leq P \leq 156; MAP = {s ❘ s = 4 i + 1, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 3, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 2, i = 0, 1, \dots, 77} U \\ {s ❘ s = 4 i + 4, i = 0, 1, \dots, 2 P - 235}; \end{matrix}$ wherein “
      
      P”
      
      denotes a number of the original supplemental data packets, and “
      
      s”
      
      denotes a supplemental data segment position with respect to the field synchronizing signal segment within the data field.

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VSB communication system

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VSB communication system

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