Television – Bandwidth reduction system – Data rate reduction
Patent
1994-12-28
1997-05-27
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348396, 348397, 348409, 348416, H04N 718
Patent
active
056336845
ABSTRACT:
An image information compression and decompression device produces a low frequency band signal suitable for reproduction of a standard definition (SD) image and a combined high frequency band signal which, when processed together with the low frequency band signal, can reproduce a high definition (HD) image. These signals are derived from a high definition (HD) image signal and are subjected to motion compensation prediction coding. An I picture of the HD image is divided into a plurality of band signals which are coded and quantized by a coding/quantizing circuit. Thus, an intra-plane coding of the divided image signal is performed for the I picture. For a P picture of the HD image, a low frequency band signal is derived and a combined high frequency band signal excluding the low frequency band signal is produced. The low frequency band signal and the combined high frequency band signal are subjected to motion compensation prediction coding by a motion compensation prediction coding circuit. This results in a system which is compatible to both standard and high definition television systems.
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See Attached Page of Seven Listed Documents.
WO-A-93 20653 (Bell Communications Research, INC) Oct. 1993.
EBU Technical Review No. 251, Mar. 21, 1992 EBU, Brussels, BE, pp. 34-44, XP 000275389, Mau et al "Sub-band Source Coding for HDTV".
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Harumatsu Mitsuo
Higurashi Seiji
Teranishi Yasuhiko
Chin Tommy P.
Meller Michael N.
Rao Anand S.
Victor Company of Japan Ltd.
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