H - Electricity – 04 – B
Patent
H - Electricity
04
B
350/33, 354/67,
H04B 14/04 (2006.01) H03H 17/02 (2006.01) H03H 17/06 (2006.01)
Patent
CA 1308487
- 14 - Abstract of the Disclosure A digital data rate compression system accepts an input digital signal having A plurality of samples at a given rate and outputs a digital signal at one-half of the given rate, or as an expansion system outputs a digital signal at twice the given rate. The digital data rate reduction technique uses multi-rate digital filtering in the form of a half bandwidth filter. In the case of the digital filter the input digital signal is separated into even and odd samples which are input to separate delay lines at one-half the given rate. The even samples are summed in pairs symmetrically about the center of the even delay line, and each pair is weighted according to a modified sin(x)/x function with simple coefficients which may be accomplished by additions and shifts, to eliminate the need for multipliers. For data rate reduction the even sample pairs from the even delay line and the odd samples from the odd sample delay line are combined to form an average of the even samples and the odd samples which is the coded digital signal at one-half the given rate. For data rate expansion a multiplexer may be used to combine the even and odd samples to produce an output digital signal at twice the given rate to decode the coded digital signal.
568178
Grass Valley Group Inc. (the)
Kirby Eades Gale Baker
LandOfFree
Simple coefficient half-bandwidth digital filter for video... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Simple coefficient half-bandwidth digital filter for video..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simple coefficient half-bandwidth digital filter for video... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1314968