Variable length code detection in a signal processing system

Details Variable length code detection in a signal processing system Variable length code detection in a signal processing system

1996-10-18

1998-10-13

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

348423, H03M 740, H04N 712

Patent

active

058218866

ABSTRACT:
A group of incoming data stream bits having packed variable length code ("VLC") words is applied to an entropy code bit length searching module. The group of bits is replicated within a plurality of matching modules selectively distributed among entropy code bit length searching logic units. Each unit of entropy code bit length searching logic supports a VLC word table as characterized by, for example, standard compression formats such as MPEG-1, MPEG-2, H.261, and H.263. The matching modules are divided into groups within the entropy code bit length searching logic units. A group of matching modules is allocated to each VLC bit length represented in the associated VLC word supported table. A number of matching modules are allocated to each bit length equal to a minimum number of patterns unique to VLC words of a particular bit length. The matching modules compare an incoming data group to respective patterns. A detected match is indicated by an appropriately set group output signal. Each entropy code bit length searching logic unit includes a bit length encoder that receives the group output signals. The set group output signal indicates the bit length of a current VLC, and the bit length encoder encodes this information into a bit length code output signal. The bit length code signal is utilized by a shifter to parse a corresponding bit length of current data. The parsed current data may be directly applied to an address generator which generates an output signal for a decoding look up table.

REFERENCES:
patent: 3701108 (1972-10-01), Loh et al.

Affiliated with

Also associated with

Rating

Variable length code detection in a signal processing system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable length code detection in a signal processing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable length code detection in a signal processing system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-317291