Title :
An experimental digital VCR for consumer use
Author :
Yamamitsu, C. ; Iketani, A. ; Ohta, J. ; Echigo, N.
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
fDate :
3/1/1995 12:00:00 AM
Abstract :
An experimental digital VCR (DVCR hereinafter) was developed. The DVCR has two new technologies for reduction of tape consumption. One is a bit rate reduction technology of a component video signal down to around 25 Mbps and the other is a high density recording technology. The bit rate reduction technology is based on an 8/spl times/8/2/spl times/4/spl times/8 two dimensional DCT (Discrete Cosine Transform) and a VLC (Variable Length Coding) that completes over 5 macro blocks. Editing, trick plays and invisible error concealments also have been realized by this bit rate reduction while keeping the playback picture quality very high. The high density recording technology is based on ME tape and an ATF (Automatic Track Finding) system. A track pitch of 10 /spl mu/m and a bit length on tape of 0.25 /spl mu/m have been realized. The possibility of a higher linear recording density has been confirmed through theoretical analysis, simulations and experiments.<>
Keywords :
data compression; digital magnetic recording; discrete cosine transforms; variable length codes; video coding; video recording; video signal processing; video tape recorders; 0.25 micron; 10 micron; 25 Mbit/s; ME tape; automatic track finding; bit rate reduction technology; consumer use; digital VCR; discrete cosine transform; editing; high density recording technology; invisible error concealments; linear recording density; reduction of tape consumption; trick plays; two dimensional DCT; variable length coding; video cassette recorder; video signal; Analytical models; Binary sequences; Bit rate; Discrete cosine transforms; Noise reduction; Redundancy; Servosystems; Signal generators; Video recording;
Journal_Title :
Magnetics, IEEE Transactions on
