Processing digitally encoded signals

Details Processing digitally encoded signals Processing digitally encoded signals

1997-10-06

2000-12-12

Rao, Andy

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

382232, 382236, 37524001, H04N 712

Patent

active

061608440

ABSTRACT:
An MPEG2 encoded signal comprising intra-encoded pictures I and inter-encoded pictures B is decoded (70-74) to baseband and re-encoded (76) to I-pictures. The quantisation levels Q.sub.v and the motion vectors M.sub.v of the B pictures are retained unchanged and maintained in association with the corresponding pictures re-encoded as I-pictures. The I-pictures can be decoded to baseband, processed, and re-encoded as I-pictures without degradation. The I-pictures can then be re-encoded back to e.g. I, B pictures with minimal degradation. Alternatively, some of the I-pictures are decoded and converted to B pictures retaining unchanged the quantisation levels thereof.

REFERENCES:
patent: 5191436 (1993-03-01), Yonemitsu
patent: 5457675 (1995-10-01), Suzuki et al.
patent: 5485611 (1996-01-01), Astle
patent: 5577191 (1996-11-01), Bonomi
patent: 5587806 (1996-12-01), Yamada et al.
patent: 5617142 (1997-04-01), Hamilton
patent: 5742347 (1998-04-01), Kandlur et al.
patent: 5745181 (1998-04-01), Wilkinson
patent: 5754239 (1998-05-01), Wilkinson

Affiliated with

Also associated with

Rating

Processing digitally encoded signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processing digitally encoded signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processing digitally encoded signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-224401