Title:
METHOD AND DEVICE FOR DIGITAL/AUDIO SIGNAL RECORDING AND REPRODUCING
Document Type and Number:
Japanese Patent JP3498375
Kind Code:
B2
Abstract:
PURPOSE: To provide an audio signal recording and reproducing device in which low frequency region signal components are reproduced in a conventional reproducing device and the signals in a high frequency region are also reprocessed.
CONSTITUTION: Digital/audio signals are divided into high and low frequency region signal components by a band dividing filter 1. The lower frequency region components are straightly PCM processed in order to maintain the compatibility with respect to a conventional reproducing. The high frequency region components are high efficiency coding processed via a requantizing circuit 5 and an entropy coding circuit 6. A comparison circuit 8 compares whether the straightly PCM signals and high efficiency coding processed signals are included in a prescribed bit length or not and if not, requantization is conducted in the circuit 5 in which the bit length is shortened. A bit redistributing circuit 9 performs redistribution of the straight PCM bit data and the high efficient coding processing bit data and the wave data are recorded on a CD. The subcode data of the circuit 6 and the requantization bit number of the circuit 5 are recorded on the CD.
Inventors:
Kenichi Imai
Tadao Suzuki
Kenzo Akagiri
Makoto Akune
Tadao Suzuki
Kenzo Akagiri
Makoto Akune
Application Number:
JP16847194A
Publication Date:
February 16, 2004
Filing Date:
July 20, 1994
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G10L19/00; G10L19/02; G11B20/00; G11B20/10; G11B27/30; H03M7/30; H03M7/40; H04B14/04; (IPC1-7): G11B20/10; H03M7/30
Domestic Patent References:
| JP5250811A | ||||
| JP61101132A | ||||
| JP2192334A | ||||
| JP590972A | ||||
| JP750640A | ||||
| JP7311594A | ||||
| JP7505984A |
Other References:
【文献】国際公開93/12599(WO,A1)
Attorney, Agent or Firm:
Takahisa Sato