Apparatus for further compressing and recording encoded digital

Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

348423, 341 67, 382246, 382248, H04N 576, H04N 750

Patent

active

056574169

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: 4468170 (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 21 st Century".
NASA Tech Briefs, Dec. 1989, p. 1009, Watson, "Ideal Resampling of Discrete Sequences".
"Flexibly Scalable Digital Video Coding", Signal Processing: Image Communication 5 (1993) 5-20, 1993.
"The MPEG video Compression Algorthm", Signal Processing: Image Communication 4 (1992) 129-140.
"Subband Based TV Coding", Signal Processing: Image Communication 5 (1993) 105-118, 1993.
"Algorithms for Manipulating Compresses Images", IEEE Computer Graphics & Applications, 1993.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for further compressing and recording encoded digital does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for further compressing and recording encoded digital , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for further compressing and recording encoded digital will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-167184

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.