Patent ID: 7391960

Claim:
A recording and reproducing device comprising: an extracting unit for extracting audio data and video data in DIF blocks from an incoming DIF stream; a data reconstruction unit for detecting identifiers of the DIF blocks in the incoming DIF stream, extracting, from the DIF stream, leading predetermined number of bytes of header DIF block, leading predetermined number of bytes of sub-code DIF block, a video auxiliary DIF block, and leading identifier and audio auxiliary data of audio DIF block, and reconstructing the extracted data as reconstructed system data; a recording and reproducing unit for recoding and reproducing said audio data as extracted by said extracting unit, said video data as extracted by said extracting unit and said system data as reconstructed by said data reconstruction unit respectively in an audio data area, a video data area and a system data area, which are separately allocated in a recording medium, in units of a predetermined data amount; and a combining unit for replacing said audio auxiliary data contained in said audio data by said audio auxiliary data contained in said reconstructed system data when combining said audio data, said video data and said reconstructed system data as reproduced by said recording and reproducing unit; wherein, upon carrying out a postrecording process of said audio data, the recording and reproducing unit rewrites said audio data of the audio DIF block recorded in the audio data area and said audio auxiliary data recorded in the system data area.