Audio decoder circuit and method of operation

Details Audio decoder circuit and method of operation Audio decoder circuit and method of operation

1995-06-07

1997-08-12

Harrell, Robert B.

Pulse or digital communications

Pulse code modulation

375316, G06F 1700

Patent

active

056574541

ABSTRACT:
A data processing system (10) is disclosed which comprises a microprocessor host (12) coupled to a decoding system (14). A host interface block (18) receives a bit stream and passes bit stream on to a system decoder block (20). The system decoder block (20) extracts the appropriate data from the bit stream and loads an input buffer (24) or an optional external buffer (26). An audio decoder block (28) retrieves the data from the input buffer (24) and generates scale factor indices, bit per code word values and subband samples which are stored in an arithmetic unit buffer (30). A hardware filter arithmetic unit block (32) retrieves the information from the arithmetic unit buffer (30) and dequantizes, transforms and filters the data to generate PCM output data which is loaded into a PCM buffer (34). The data within the PCM buffer (34) is output by a PCM output block (36) to a digital-to-analog converter (16).

REFERENCES:
patent: 4491943 (1985-01-01), Iga et al.
patent: 4583132 (1986-04-01), Nakano et al.
patent: 4677645 (1987-06-01), Kaniwa et al.
patent: 4748628 (1988-05-01), Moriwaki
patent: 4994912 (1991-02-01), Lomelsky et al.
patent: 5157488 (1992-10-01), Pennebaker
patent: 5243428 (1993-09-01), Challapali et al.
patent: 5253275 (1993-10-01), Yurt et al.
patent: 5258999 (1993-11-01), Wenimont et al.
patent: 5271011 (1993-12-01), McMullan, Jr. et al.
patent: 5280394 (1994-01-01), Murabayashi et al.
patent: 5285498 (1994-02-01), Johnston
patent: 5323396 (1994-06-01), Lokhoff
patent: 5347305 (1994-09-01), Bush et al.
patent: 5367301 (1994-11-01), Stiltner et al.
patent: 5394473 (1995-02-01), Davidson
patent: 5394508 (1995-02-01), Lim
patent: 5440584 (1995-08-01), Wiese

Affiliated with

Also associated with

Rating

Audio decoder circuit and method of operation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Audio decoder circuit and method of operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Audio decoder circuit and method of operation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-168573