Reception apparatus, reception method and reception system

1. A reception apparatus, comprising:

first acquisition means for receiving a signal which includes at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal and acquiring the preamble signal from the received signal;

detection means for detecting a value for correcting the signal using the signal; and

correction means for correcting, if it is decided based on the preamble signal acquired by said first acquisition means that the signal is the first signal, the signal using the value detected by said detection means.

2. The reception apparatus according to claim 1 , wherein said correction means abandons the value detected by said detection means where it is decided based on the preamble signal acquired by said first acquisition means that the signal is not the first signal.

3. The reception apparatus according to claim 2 , wherein said correction means corrects, where it is decided that the signal is the first signal, the signal using the value detected by said detection means before a next preamble signal is acquired by said first acquisition means, but abandons, where it is decided that the signal is not the first signal, the value detected by said detection means before a next preamble signal is acquired by said first acquisition means.

4. The reception apparatus according to claim 3 , further comprising:

second acquisition means for acquiring, when the signal is the first signal, a different preamble signal succeeding the preamble signal from the signal; and

processing inhibition means for inhibiting the detection process by said detection means based on information of the second signal included in the different preamble signal acquired by said second acquisition means.

5. The reception apparatus according to claim 4 , wherein the information of the second signal is a length of and a distance between intervals of the second signal of the signal.

6. The reception apparatus according to claim 1 , wherein said detection means detects a fine carrier displacement amount based on a guard interval correlation included in the signal, a fine carrier displacement amount based on a pilot signal included in the signal, or a coarse carrier displacement amount or else a sampling error amount as the value for correcting the signal.

7. A reception method, comprising the steps of:

receiving a signal which includes at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal and acquiring the preamble signal from the received signal;

detecting a value for correcting the signal using the signal; and

correcting, if it is decided based on the acquired preamble signal that the signal is the first signal, the signal using the detected value.

8. A reception system, comprising:

an acquisition section adapted to acquire a signal through a transmission line; and

a transmission line decoding processing section adapted to carry out a transmission line decoding process including at least a demodulation process for the signal acquired through the transmission line;

the signal acquired through the transmission line including at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal;

said transmission line decoding processing section including

acquisition means for acquiring the preamble signal from the signal,

detection means for detecting a value for correcting the signal using the signal, and

correction means for correcting, if it is decided based on the preamble signal acquired by said acquisition means that the signal is the first signal, the signal using the value detected by said detection means.

9. A reception system, comprising:

a transmission line decoding processing section adapted to carry out a transmission line decoding process including at least a demodulation process for a signal acquired through a transmission line; and

an information source decoding processing section adapted to carry out an information source decoding process including at least a process of decompressing compressed information into original information for the signal for which the transmission line decoding process is carried out;

the signal acquired through the transmission line including at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal;

said transmission line decoding processing section including

acquisition means for acquiring the preamble signal from the signal,

detection means for detecting a value for correcting the signal using the signal, and

correction means for correcting, if it is decided based on the preamble signal acquired by said acquisition means that the signal is the first signal, the signal using the value detected by said detection means.

10. A reception system, comprising:

a transmission line decoding processing section adapted to carry out a transmission line decoding process including at least a demodulation process for a signal acquired through a transmission line; and

an outputting section adapted to output an image or sound based on the signal for which the transmission line decoding process is carried out;

the signal acquired through the transmission line including at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal;

said transmission line decoding processing section including

acquisition means for acquiring the preamble signal from the signal,

detection means for detecting a value for correcting the signal using the signal, and

correction means for correcting, if it is decided based on the preamble signal acquired by said acquisition means that the signal is the first signal, the signal using the value detected by said detection means.

11. A reception system, comprising:

a transmission line decoding processing section adapted to carry out a transmission line decoding process including at least a demodulation process for a signal acquired through a transmission line; and

a recording section adapted to record the signal for which the transmission line decoding process is carried out;

the signal acquired through the transmission line including at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal;

said transmission line decoding processing section including

acquisition means for acquiring the preamble signal from the signal,

detection means for detecting a value for correcting the signal using the signal, and

correction means for correcting, if it is decided based on the preamble signal acquired by said acquisition means that the signal is the first signal, the signal using the value detected by said detection means.

12. A reception apparatus, comprising:

an acquisition section adapted to receive a signal which includes at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal and acquire the preamble signal from the received signal;

a detection section adapted to detect a value for correcting the signal using the signal; and

a correction section adapted to correct, if it is decided based on the preamble signal acquired by said acquisition section that the signal is the first signal, the signal using the value detected by said detection section.

13. A reception system, comprising:

acquisition means for acquiring a signal through a transmission line; and

transmission line decoding processing means for carrying out a transmission line decoding process including at least a demodulation process for the signal acquired through the transmission line;

the signal acquired through the transmission line including at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal;

said transmission line decoding processing means including

acquisition means for acquiring the preamble signal from the signal,

detection means for detecting a value for correcting the signal using the signal, and

correction means for correcting, if it is decided based on the preamble signal acquired by said acquisition means that the signal is the first signal, the signal using the value detected by said detection means.

14. A reception system, comprising:

transmission line decoding processing means for carrying out a transmission line decoding process including at least a demodulation process for a signal acquired through a transmission line; and

information source decoding processing for carrying out an information source decoding process including at least a process of decompressing compressed information into original information for the signal for which the transmission line decoding process is carried out;

the signal acquired through the transmission line including at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal;

said transmission line decoding processing means including

acquisition means for acquiring the preamble signal from the signal,

detection means for detecting a value for correcting the signal using the signal, and

correction means for correcting, if it is decided based on the preamble signal acquired by said acquisition means that the signal is the first signal, the signal using the value detected by said detection means.

15. A reception system, comprising:

transmission line decoding processing means for carrying out a transmission line decoding process including at least a demodulation process for a signal acquired through a transmission line; and

outputting means for outputting an image or sound based on the signal for which the transmission line decoding process is carried out;

the signal acquired through the transmission line including at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal;

said transmission line decoding processing means including

acquisition means for acquiring the preamble signal from the signal,

detection means for detecting a value for correcting the signal using the signal, and

correction means for correcting, if it is decided based on the preamble signal acquired by said acquisition means that the signal is the first signal, the signal using the value detected by said detection means.

16. A reception system, comprising:

transmission line decoding processing means for carrying out a transmission line decoding process including at least a demodulation process for a signal acquired through a transmission line; and

recording means for recording the signal for which the transmission line decoding process is carried out;

the signal acquired through the transmission line including at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal;

said transmission line decoding processing means including

acquisition means for acquiring the preamble signal from the signal,

detection means for detecting a value for correcting the signal using the signal, and

correction means for correcting, if it is decided based on the preamble signal acquired by said acquisition means that the signal is the first signal, the signal using the value detected by said detection means.