Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1994-06-01
1996-10-29
Tran, Thai
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
348390, 348405, 348409, 348422, 348423, 382246, 382248, 341 67, H04N 576, H04N 712
Patent
active
055701973
ABSTRACT:
An encoded video data re-compressing apparatus further compresses, for further transmission or storage, an encoded video data stream that includes quantization parameters and quantized coefficients without having to decompress the encoded video data streams and subsequently re-compress the decompressed video data. The encoded video data stream is parsed for extracting the quantization parameters and quantized coefficients from other side information. The quantized coefficients are either divided by a predetermined integer or selectively discarded to reduce the total number of bits. In the former case, the corresponding quantization parameters are multiplied by a predetermined integer. The manipulated coefficients and quantization parameters are multiplexed with the side information, such that they occupy the location of the corresponding original coefficients and quantization parameters in the video data stream. Equipped with a digital data recorder and a set of switches, the encoded digital video data stream could be recorded in either its original form (a normal recording mode) or a more compact form (a long recording mode) by dividing the quantized coefficients by a predetermined integer or selectively discarding some of the coefficients.
REFERENCES:
patent: 3921132 (1975-11-01), Baldwin
patent: 4142209 (1979-02-01), Hedlund et al.
patent: 4277807 (1981-07-01), Baldwin
patent: 4468710 (1984-08-01), Hashimoto et al.
patent: 4903317 (1990-02-01), Nishihara et al.
patent: 5225904 (1993-07-01), Gollin et al.
patent: 5321440 (1994-06-01), Yanagihara et al.
SMPTE Journal, vol. 101, No. 7, Jul. 1992, pp. 466-470, Reitmeyer et al., "The Digital Hierarchy--A Blueprint for Television in the 21st Century".
NASA Tech Briefs, Dec. 1989, p. 1009, Watson, "Ideal Resampling of Discrete Sequence".
"Flexibly Scalable Digital Video Coding", Signal Processing: Image Communication 5 (1993) 5-20, 1993.
"The MPEG Video Compression Algorithm", Signal Processing: Image Communication 4 (1992) 129-140.
"Subband Based TV Coding", Signal Processing: Image Communication 5 (1993) 105-118, 1993.
"Algorithms for Manipulating Compressed Images", IEEE Computer Graphics & Applications, 1993.
Matsushita Electric - Industrial Co., Ltd.
Tran Thai
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