Signal processing device and method and reception system

A reception system comprising:

• acquisition means for acquiring a signal transmitted over a transmission path;
• and
• transmission path decoding means for performing processes on the signal acquired by the acquisition means including measurement of the power spectrum, wherein
• the transmission path decoding means includes
• adjustment means for adjusting the power of each of subinterval signals by multiplying the subinterval signals by a gain adapted to bring the power to a given level, the subinterval signals being input signals each having a frequency component of one of a plurality of subintervals into which the frequency band over which the power spectrum is to be measured is divided, and
• correction means for correcting the power of each of the subinterval signals, whose power has been adjusted by the adjustment means, by multiplying the power spectrum by the reciprocal of the gain used for adjustment of the power by the adjustment means.

A reception system comprising:

• transmission path decoding means for performing processes on the signal acquired via a transmission path including measurement of the power spectrum;
• and
• information source decoding means for decoding data to be transmitted in the signal processed by the transmission path decoding means, wherein
• the transmission path decoding means includes
• adjustment means for adjusting the power of each of subinterval signals by multiplying the subinterval signals by a gain adapted to bring the power to a given level, the subinterval signals being input signals each having a frequency component of one of a plurality of subintervals into which the frequency band over which the power spectrum is to be measured is divided, and
• correction means for correcting the power of each of the subinterval signals, whose power has been adjusted by the adjustment means, by multiplying the power spectrum by the reciprocal of the gain used for adjustment of the power by the adjustment means.

A reception system comprising:

• transmission path decoding means for performing processes on the signal acquired via a transmission path including measurement of the power spectrum;
• and
• output means for outputting an image or sound based on the signal processed by the transmission path decoding means, wherein
• the transmission path decoding means includes
• adjustment means for adjusting the power of each of subinterval signals by multiplying the subinterval signals by a gain adapted to bring the power to a given level, the subinterval signals being input signals each having a frequency component of one of a plurality of subintervals into which the frequency band over which the power spectrum is to be measured is divided, and
• correction means for correcting the power of each of the subinterval signals, whose power has been adjusted by the adjustment means, by multiplying the power spectrum by the reciprocal of the gain used for adjustment of the power by the adjustment means.

A reception system comprising:

• transmission path decoding means for performing processes on the signal acquired via a transmission path including measurement of the power spectrum;
• and
• recording means for recording the signal processed by the transmission path decoding means, wherein
• the transmission path decoding means includes
• adjustment means for adjusting the power of each of subinterval signals by multiplying the subinterval signals by a gain adapted to bring the power to a given level, the subinterval signals being input signals each having a frequency component of one of a plurality of subintervals into which the frequency band over which the power spectrum is to be measured is divided, and
• correction means for correcting the power of each of the subinterval signals, whose power has been adjusted by the adjustment means, by multiplying the power spectrum by the reciprocal of the gain used for adjustment of the power by the adjustment means.