Television – Bandwidth reduction system – Data rate reduction
Patent
1994-05-12
1998-09-29
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
348384, 348699, H04N 750
Patent
active
RE0359106
ABSTRACT:
A moving image signal encoding apparatus includes: a frame decimating signal at specified intervals; a frame interpolating circuit for obtaining frames, and a circuit for obtaining an error formed by frame interpolation. A moving image signal decoding apparatus includes: a receiving circuit for extracting a frame code from an inputted signal; a frame decoding circuit for decoding the frame code to obtain a reproduced frame, and a frame interpolating circuit for obtaining an interpolated frame between the reproduced frames. By transmitting an error of the interpolated frame from the encoding apparatus to the decoding apparatus and correcting the error of the interpolated frame with the decoding apparatus, the error of the interpolated frame is eliminated. Alternatively, depending on the value of the error of the interpolated frame obtained with the encoding apparatus, a circuit determines the operation mode as to whether the frame interpolating circuit of the decoder carries out frame interpolation or preceding value holding and sends a flag to show the operation mode to the decoder, so that improvement occurs when the error of the interpolated frame is large.
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Takahiko Fukinuki, "Digital Signal Processing of Images", pp. 204-207, Jul. 15, 1985.
M. Tanimoto et al., "Bandwith Compression System by Using Time-Axis Transformation for High Definition Television Signal", vol. 8, No. 2, pp. 47-54, Apr. 1984.
The Transactions of the I.E.C.E. of Japan, vol. 70, No. 7, Jul. 1987, Tokyo, Japan, (pp. 611-613); "A Hybrid Scheme of Subsampled DPCM and Interpolative DPCM for the HDTV Coding".
Synposium Record Broadcast Sessions, 16th International TV Symposium, Jun. 17, 1989, (pp. 387-409); "Image Coding Techniques for 64 KBIT/S Channels".
Smpte Journal, vol. 98, No. 7, Jul. 1989 (pp. 504-511); "A Modular Digital Video Coding Architecture For Present and Advanced TV Systems".
Nagata Atsushi
Takahashi Ken'ichi
Takeguchi Nobuyasu
Britton Howard W.
Matsushita Electric - Industrial Co., Ltd.
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