Title :
Digital sound systems of S-VHS VCR
Author :
Higurashi, Seiji ; Suwa, Tetsuya ; Tsushima, Takuya
Author_Institution :
Victor Co. of Japan Ltd., Yokohama, Japan
fDate :
8/1/1990 12:00:00 AM
Abstract :
It is noted that PCM (pulse-code-modulated) sound can be recorded together with video and FM audio signals on an S-VHS VCR without changing the existing format. The PCM sound is available either in the two-channel mode with 16-bit/48-kHz sampling or in the four-channel mode with 12-bit/32-kHz sampling. The principle techniques used are: (1) frequency multiplexing of FM and O-QDPSK (offset quadrature differential phase shift keying) PCM audio signals, and (2) recording of multiplexed audio signal with high-frequency AC bias
Keywords :
audio recording; audio signals; audio systems; frequency modulation; phase shift keying; pulse-code modulation; signal processing; video tape recorders; 12 bit; 16 bit; 32 kHz; 48 kHz; FM audio signals; PCM sound; S-VHS VCR; digital sound system; four-channel mode; high-frequency AC bias; multiplexed audio signal; offset-DQPSK; two-channel mode; Audio recording; Audio systems; Digital modulation; Digital recording; Frequency modulation; Magnetic heads; Magnetic recording; Phase change materials; Radio spectrum management; Video recording;
Journal_Title :
Consumer Electronics, IEEE Transactions on
