Data processing apparatus and data processing method
The present technique relates to a data processing apparatus and a data processing method each of which enables a burden imposed on processing on a reception side to be reduced. A data processing apparatus produces signaling containing a Null cell number exhibiting the number of Null cells of cells of a sub-frame included in a physical layer frame, and processes the signaling so as for the signaling to be contained in a preamble of the physical layer frame, thereby enabling a burden imposed on processing on a reception side to be reduced. The present technique, for example, can be applied to data transmission complying with the broadcasting standards such as ATSC3.0.
1. A data processing apparatus, comprising:
circuitry configured to
produce signaling containing a Null cell number corresponding to a number of Null cells of cells of a sub-frame included in a physical layer frame, active data cells being arranged between Null cells, and in frequency, half of the Null cells disposed before the active data cells and half of the Null cells disposed after the active data cells; and
process the signaling to be included in a preamble of the physical layer frame.
2. The data processing apparatus according to claim 1 , wherein the Null cell number is a number of cells obtained by subtracting an active data cell number corresponding to a number of cells of valid data in the sub-frame from a total data cell number corresponding to a number of all cells in the sub-frame.
3. The data processing apparatus according to claim 2 , wherein the signaling includes first control information, and second control information following the first control information, and
the Null cell number is included either in the first control information or in the second control information.
4. The data processing apparatus according to claim 3 , wherein one or more sub-frames are included in the physical layer frame,
the Null cell number of a first sub-frame is included in the first control information, and
the Null cell number of remaining sub-frames other than the first sub-frame is included in the second control information.
5. The data processing apparatus according to claim 4 , wherein the first control information is smaller in data size than the second control information, and is transmitted in a more robust way than the second control information.
6. The data processing apparatus according to claim 2 , wherein the circuitry produces signaling including ½ of the active data cell number or ½ of the Null cell number.
7. The data processing apparatus according to claim 3 , wherein the physical layer frame is a physical layer frame prescribed in Advanced Television Systems Committee (ATSC) 3.0,
the first control information is L1-basic information (L1-Basic) prescribed in ATSC3.0,
the second control information is L1-detailed information (L1-Detail) prescribed in ATSC3.0, and
a sub-frame Boundary Symbol (SBS) as a symbol of a boundary of the sub-frame is contained in the sub-frame.
8. A data processing method for a data processing apparatus, comprising:
producing, with circuitry, signaling including a Null cell number corresponding to a number of Null cells of cells of a sub-frame included in a physical layer frame, active data cells being arranged between Null cells, and in frequency, half of the Null cells disposed before the active data cells and half of the Null cells disposed after the active data cells; and
processing, by the circuitry, the signaling to be included in a preamble of the physical layer frame.
9. A data processing apparatus, comprising:
processing circuitry configured to process signaling included in a preamble of a physical layer frame, the signaling including a Null cell number corresponding to a number of Null cells of cells of a sub-frame included in the physical layer frame, active data cells being arranged between Null cells, and in frequency, half of the Null cells disposed before the active data cells and half of the Null cells disposed after the active data cells.
10. The data processing apparatus according to claim 9 , wherein the processing circuitry is configured to: decode data, of a series of a physical layer, contained in a received signal transmitted through a transmission path, and to decipher the Null cell number included in the signaling.
11. The data processing apparatus according to claim 10 , wherein the processing circuitry is further configured to deinterleave valid data in a frequency direction in response to the Null cell number.
12. The data processing apparatus according to claim 9 , wherein the Null cell number is a number of cells obtained by subtracting an active data cell number corresponding to a number of cells of valid data of the sub-frame from a total data cell number corresponding to a number of all cells of the sub-frame.
13. The data processing apparatus according to claim 12 , wherein the signaling includes first control information, and second control information following the first control information, and
the Null cell number is included either in the first control information or in the second control information.
14. The data processing apparatus according to claim 13 , wherein one or more sub-frames are included in the physical layer frame,
the Null cell number of a first sub-frame is included in the first control information, and
the Null cell number of remaining sub-frames other than the first sub-frame is included in the second control information.
15. The data processing apparatus according to claim 14 , wherein the first control information is smaller in data size than the second control information, and is transmitted in a more robust way than the second control information.
16. The data processing apparatus according to claim 12 , wherein the signaling includes ½ of the active data cell number or ½ of the Null cell number, and
the processing circuitry processes the signaling including the active data cell number or a number of ½ of the Null cell number.
17. The data processing apparatus according to claim 13 , wherein the physical layer frame is a physical layer frame prescribed in ATSC3.0,
the first control information is L1-basic information (L1-Basic) prescribed in ATSC3.0,
the second control information is L1-detailed information (L1-Detail) prescribed in ATSC3.0, and
a Sub-frame Boundary Symbol (SBS) as a symbol of a boundary of the sub-frame is contained in the sub-frame.
18. A data processing method for a data processing apparatus, comprising:
processing, with circuitry, signaling included in a preamble of a physical layer frame and including a Null cell number corresponding to a number of Null cells of cells of a sub-frame included in the physical layer frame, active data cells being arranged between Null cells, and in frequency, half of the Null cells disposed before the active data cells and half of the Null cells disposed after the active data cells.