Title :
A new implementation of the Silicon Audio Player based on an MPEG/audio decoder LSI
Author :
Sugiyama, Akihiko ; Iwadare, Masahiro ; Manabe, Takashi ; Ohdate, Nobuhiro ; Takano, Hideto ; Kitabatake, Osamu ; Hirao, Eiji
Author_Institution :
C&C Inf. Technol. Res. Labs., NEC Corp., Kawasaki, Japan
fDate :
5/1/1997 12:00:00 AM
Abstract :
A new implementation of the Silicon Audio player is presented. It decodes data which has been encoded by the MPEG/Audio Layer II algorithm standardized by the ISO (International Standardization Organization). The encoded data is stored in a semiconductor memory card. Decoding is carried out by an MPEG/audio decoder chip. Thanks to this dedicated LSI chip, the power consumption of the player is reduced so that the player could be driven by four nickel-metal hydride batteries for four and a half hours. Since the Silicon Audio player has no mechanical movement, it is robust against vibration that has been a serious problem for portable audio players. The recording time is defined as a function of the memory-card capacity and the compression ratio. Assuming one eighth compression with a sampling rate of 48 kHz, a 24-minute recording is possible with a 32-Mbyte memory card
Keywords :
ISO standards; audio coding; audio equipment; code standards; decoding; integrated memory circuits; large scale integration; telecommunication standards; 24 min; 32 MByte; 48 kHz; ISO; International Standardization Organization; LSI chip; MPEG/Audio Layer II algorithm; MPEG/audio decoder LSI; MPEG/audio decoder chip; Silicon Audio Player; audio coding; compression ratio; decoding; encoded data; memory card capacity; nickel-metal hydride batteries; portable audio players; power consumption reduction; recording time; sampling rate; semiconductor memory card; standardized algorithm; Audio recording; Batteries; Decoding; Energy consumption; ISO standards; Large scale integration; Robustness; Semiconductor memory; Silicon; Standardization;
Journal_Title :
Consumer Electronics, IEEE Transactions on
