Signal compressing apparatus

A signal compressing apparatus comprising:

• means for quantizing an input signal into a quantization-resultant signal;
• means for compressing the quantization-resultant signal into a compression-resultant signal;
• and
• means for formatting the compression-resultant signal into a formatting-resultant signal corresponding to a predetermined format for a digital recording disc, the formatting-resultant signal including segments corresponding to user data areas prescribed in the predetermined format, the compression-resultant signal being placed in the segments of the formatting-resultant signal.

A recording medium storing an encoding-resultant signal which is recorded on the recording medium by the steps of quantizing an input signal into a quantization-resultant signal;

• compressing the quantization-resultant signal into a compression-resultant signal;
• formatting the compression-resultant signal into a formatting-resultant signal corresponding to a predetermined format for a digital recording disc, the formatting-resultant signal including segments corresponding to user data areas prescribed in the predetermined format, the compression-resultant signal being placed in the segments of the formatting-resultant signal;
• encoding the formatting-resultant signal into an encoding-resultant signal of a CD format;
• and recording the encoding-resultant signal on the recording medium.

An apparatus for an optical disc, comprising:

• a CD-DA decoder;
• a CD-ROM decoder;
• a signal expansion decoder;
• means for reading out a signal from the optical disc;
• means for deciding which of a CD-DA, a CD-ROM, and a CD-ROM-audio the optical disc agrees with;
• means for, when the optical disc agrees with a CD-DA, selecting the CD-DA decoder from among the CD-DA decoder, the CD-ROM decoder, and the signal expansion decoder and using the CD-DA decoder to process the signal read out from the optical disc into a recovered signal;
• means for, when the optical disc agrees with a CD-ROM, selecting the CD-DA decoder and the CD-ROM decoder from among the CD-DA decoder, the CD-ROM decoder, and the signal expansion decoder and using the CD-DA decoder and the CD-ROM decoder to process the signal read out from the optical disc into a recovered signal;
• and
• means for, when the optical disc agrees with a CD-ROM-audio, using the CD-DA decoder, the CD-ROM decoder, and the signal expansion decoder to process the signal read out from the optical disc into a recovered signal.

An apparatus for an optical disc, comprising:

• a CD-DA decoder;
• a CD-ROM decoder;
• a signal expansion decoder;
• an MPEG decoder;
• means for reading out a signal from the optical disc;
• means for deciding which of a CD-DA, a CD-ROM-audio, and a video-CD the optical disc agrees with;
• means for, when the optical disc agrees with a CD-DA, selecting the CD-DA decoder from among the CD-DA decoder, the CD-ROM decoder, the signal expansion decoder, and the MPEG decoder and using the CD-DA decoder to process the signal read out from the optical disc into a recovered signal;
• means for, when the optical disc agrees with a CD-ROM-audio, selecting the CD-DA decoder, the CD-ROM decoder, and the signal expansion decoder from among the CD-DA decoder, the CD-ROM decoder, the signal expansion decoder, and the MPEG decoder and using the CD-DA decoder, the CD-ROM decoder, and the signal expansion decoder to process the signal read out from the optical disc into a recovered signal;
• and
• means for, when the optical disc agrees with a video-CD, selecting the CD-DA decoder, the CD-ROM decoder, and the MPEG from among the CD-DA decoder, the CD-ROM decoder, the signal expansion decoder, and the MPEG decoder and using the CD-DA decoder, the CD-ROM decoder, and the MPEG decoder to process the signal read out from the optical disc into a recovered signal.