Data processing apparatus having a digital recording and reproducing system and an analog reproducing system

A data processing apparatus comprising:

• an analog reproducing system for reading analog information from an analog information recording medium and for generating a first analog signal in response to the analog information;
• a digital recording and reproducing system including:
• means for reading digital information from a digital information recording medium and for generating a reproduced digital signal;
• an analog-to-digital converting section connected to the analog reproducing system for receiving the first analog signal and for converting the reproduced analog signal into a converted digital signal;
• a first digital signal processing section connected to the means for reading digital information for receiving the reproduced digital signal, and for generating a first processed digital signal in response to the reproduced digital signal;
• a second digital signal processing section connected to the analog-to-digital converting section for receiving the converted digital signal, and for generating a second processed digital signal in response to the converted digital signal;
• a digital-to-analog converting section for converting either of the first processed digital signal and the second processed digital signal into a processed analog signal;
• a band-pass filter section connected between the analog-to-digital converting section and the second digital signal processing section for dividing the converted digital signal into a plurality of frequency band signals, each frequency band signal corresponding to one of a plurality of predetermined frequency bands;
• means for writing digital information onto a digital information recording medium;
• an error correction code section, connected to the means for reading digital information and the means for writing digital information, for interpolating the reproduced digital signal, and for transmitting the interpolated reproduced digital signal to the second digital signal processing section;
• an operational section connected to the band-pass filter section for compressing and encoding the plurality of frequency band signals;
• and
• a sub-band coding section connected to the operational section for formatting the compressed and encoded frequency band signals and for transmitting the formatted, compressed and encoded frequency band signals to the error correction code section for transmission to the means for writing digital information.