Title :
The development of a circuit for the compression of digital audio
Author :
Nishida, Hideharu ; Inoue, Takeo ; Hirai, Hiroyuki ; Tsukihashi, Akira ; Sugishita, Shozo ; Abe, Yuzo
Author_Institution :
Sanyo Electr. Co. Ltd., Osaka, Japan
Abstract :
A circuit for the compression of digital audio has been developed which is very small in scale (less than 4000 gates) but exhibits nearly the same quality at 220.5 kb/s as the 705.6 kb/s 16 b PCM (pulse-code-modulated) sound. The proposed method improves the conventional ADPCM (adaptive differential pulse code modulation) coding method. This circuit was used to produce a low-cost and compact antishock compact disc player
Keywords :
audio equipment; audio signals; codecs; data compression; filtering and prediction theory; pulse-code modulation; signal processing equipment; 220.5 kbit/s; ADPCM; adaptive differential pulse code modulation; antishock compact disc player; coding; digital audio compression circuit; Audio recording; Auditory system; CD recording; Circuits; Decoding; Electric shock; Optical recording; Optical sensors; Signal processing; Signal restoration;
Journal_Title :
Consumer Electronics, IEEE Transactions on
