Patent ID: 7236688

Claim:
A signal processing method for reading data from a first recording medium on which multiplexed data obtained by multiplexing coded audio data and coded video data are recorded, and recording the data on a second recording medium, comprising: a reading step of reading the multiplexed data from the first recording medium; a decoding step of decoding at least one of: (i) at least part of the coded audio data included in the readout multiplexed data; and (ii) at least part of the coded video data included in the readout multiplexed data, to generate decoded data; a designation step of designating a portion of the decoded data as a portion to be re-coded; a re-coding step of re-coding the portion of the decoded data designated in the designation step by a coding method which is different from a first coding method used in a coding process of the coded audio data and a second coding method used in a coding process of the coded video data, to generate re-coded data; and a recording step of recording the re-coded data on the second recording medium.