Receiving apparatus, receiving method and program, and receiving system

1. A receiving apparatus, comprising:

decoding means for receiving and decoding a low density parity check code; and

decoding control means for controlling a frequency of said decoding on the basis of conditional information that is an index indicative of a communication condition that influences power consumption in said decoding means,

wherein said decoding means repetitively executes said decoding to output a decoding result until one of the reception of a new low density parity check code and the successful decoding of said low density parity check code is achieved; and

wherein said decoding control means computes a free time in which said decoding is not executed on the basis of said reception interval and an output timing of said decoding result and controls a speed of said decoding on the basis of the computed free time.

2. The receiving apparatus according to claim 1 , wherein said decoding control means controls the frequency of said decoding on a code word basis.

3. The receiving apparatus according to claim 1 , further comprising:

computing means for computing a bit error rate on the basis of said low density parity check code and a decoding result thereof, wherein

said decoding control means controls said decoding frequency by use of said bit error rate computed by said computing means as said conditional information.

4. The receiving apparatus according to claim 1 , wherein

said decoding means repeats said decoding until either the reception of a new one of said low density parity check code, or successful decoding of the current low density parity check code is achieved; and

said decoding control means uses, as said conditional information, one of a decoding count of said low density parity check code and a count in which the decoding of said low density parity check code has been unsuccessful until the reception of said new one of said low density parity check code, thereby controlling said decoding frequency.

5. The receiving apparatus according to claim 1 , wherein said decoding control means uses a carrier-noise ratio of said low density parity check code as said conditional information, thereby controlling said decoding frequency.

6. The receiving apparatus according to claim 1 , wherein said decoding control means changes said decoding frequency in a stepwise manner.

7. The receiving apparatus according to claim 1 , wherein said decoding control means also controls a speed of said decoding on the basis of a reception interval of said low density parity check code.

8. A receiving method, comprising the steps of:

receiving and decoding a low density parity check code; and

controlling a frequency of said decoding on the basis of conditional information that is an index indicative of a communication condition influencing power consumption in decoding,

wherein said receiving and decoding comprises repetitively executing said decoding to output a decoding result until one of the reception of a new low density parity check code and the successful decoding of said low density parity check code is achieved; and

wherein said decoding controlling comprises computing a free time in which said decoding is not executed on the basis of said reception interval and an output timing of said decoding result and controls a speed of said decoding on the basis of the computed free time.

9. A non-transitory, computer-readable medium having instructions for making a computer execute processing on a received low density parity check code, comprising the steps of:

decoding a low density parity check code; and

controlling a frequency of said decoding on the basis of conditional information that is an index indicative of a communication condition influencing power consumption in decoding,

wherein decoding said low density parity check code comprises repetitively executing said decoding to output a decoding result until one of the reception of a new low density parity check code and the successful decoding of said low density parity check code is achieved; and

wherein decoding controlling a frequency comprises computing a free time in which said decoding is not executed on the basis of said reception interval and an output timing of said decoding result and controls a speed of said decoding on the basis of the computed free time.

10. A receiving system, comprising:

acquisition means for acquiring a signal from a transmission path; and

transmission path decode processing means for executing transmission path decode processing on a signal acquired by said acquisition means, wherein

said transmission path decode processing means includes

decoding means for decoding a low density parity check code of said signal; and

decoding control means for controlling a frequency of said decoding on the basis of conditional information that is an index indicative of a communication condition that influences power consumption in said decoding means,

wherein said decoding means repetitively executes said decoding to output a decoding result until one of the reception of a new low density parity check code and the successful decoding of said low density parity check code is achieved; and

wherein said decoding control means computes a free time in which said decoding is not executed on the basis of said reception interval and an output timing of said decoding result and controls a speed of said decoding on the basis of the computed free time.

11. A receiving system, comprising:

transmission path decode processing means for executing transmission path decode processing on a signal acquired from a transmission path; and

information source decode processing means for executing information source decode processing on said signal executed with the transmission path decode processing by said transmission path decode processing means, wherein

said transmission path decode processing means includes

decoding means for decoding a low density parity check code of said signal; and

decoding control means for controlling a frequency of said decoding on the basis of conditional information that is an index indicative of a communication condition that influences power consumption in said decoding means,

wherein said decoding means repetitively executes said decoding to output a decoding result until one of the reception of a new low density parity check code and the successful decoding of said low density parity check code is achieved; and

wherein said decoding control means computes a free time in which said decoding is not executed on the basis of said reception interval and an output timing of said decoding result and controls a speed of said decoding on the basis of the computed free time.

12. A receiving system, comprising:

transmission path decode processing means for executing transmission path decode processing on a signal acquired from a transmission path; and

output means for outputting at least one of image data and audio data on the basis of said signal executed with the transmission path decode processing by said transmission path decode processing means, wherein

said transmission path decode processing means includes

decoding means for decoding a low density parity check code of said signal; and

decoding control means for controlling a frequency of said decoding on the basis of conditional information that is an index indicative of a communication condition that influences power consumption in said decoding means,

wherein said decoding means repetitively executes said decoding to output a decoding result until one of the reception of a new low density parity check code and the successful decoding of said low density parity check code is achieved; and

wherein said decoding control means computes a free time in which said decoding is not executed on the basis of said reception interval and an output timing of said decoding result and controls a speed of said decoding on the basis of the computed free time.

13. A receiving system, comprising:

transmission path decode processing means for executing transmission path decode processing on a signal acquired from a transmission path; and

recording control means for controlling recording of said signal executed with the transmission path decode processing by said transmission path decode processing means, wherein

said transmission path decode processing means includes

decoding means for decoding a low density parity check code of said signal; and

decoding control means for controlling a frequency of said decoding on the basis of conditional information that is an index indicative of a communication condition that influences power consumption in said decoding means,

wherein said decoding means repetitively executes said decoding to output a decoding result until one of the reception of a new low density parity check code and the successful decoding of said low density parity check code is achieved; and

wherein said decoding control means computes a free time in which said decoding is not executed on the basis of said reception interval and an output timing of said decoding result and controls a speed of said decoding on the basis of the computed free time.

14. A receiving apparatus, comprising:

a decoding section configured to receive and decode an low density parity check code; and

a decoding control section configured to control a frequency of said decoding on the basis of conditional information that is an index indicative of a communication condition that influences power consumption in said decoding section,

wherein said decoding section is configured to repetitively execute said decoding to output a decoding result until one of the reception of a new low density parity check code and the successful decoding of said low density parity check code is achieved; and

wherein said decoding control section is configured to compute a free time in which said decoding is not executed on the basis of said reception interval and an output timing of said decoding result and controls a speed of said decoding on the basis of the computed free time.