Multi-precision technique for digital audio encoder

Details Multi-precision technique for digital audio encoder Multi-precision technique for digital audio encoder

2006-10-03

2006-10-03

Tran, Sinh (Department: 2615)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Digital audio data processing system

Reexamination Certificate

active

07117053

ABSTRACT:
AC-3 is a high quality audio compression format widely used in feature films and, more recently, on Digital Versatile Disks (DVD). For consumer applications the algorithm is usually coded into the firmware of a DSP Processor, which due to cost considerations may be capable of only fixed point arithmetic. Commercial AC-3 Encoders have been successfully implemented on 20-bit and 24-bit word-length processors. However, it is generally assumed that 16-bit processing is incapable of delivering the high fidelity audio, expected from the AC-3 technology. Double precision computation can be utilised on such processors to provide the high quality; but the computational burden of such implementation will be beyond the capacity of the processor to enable real-time operation. Through extensive simulation study of a high quality AC-3 Encoder implementation, a multi-precision technique for each processing block is presented whereby the quality of the encoder on a 16-bit processor matches the single precision 24-bit implementation very closely without excessive additional computational complexity.

REFERENCES:
patent: 5787025 (1998-07-01), Muwafi et al.
patent: 6208671 (2001-03-01), Paulos et al.
patent: 0778536 (1997-06-01), None
patent: WO 98/28695 (1998-07-01), None
ATSC Digital Audio Compression Standard (AC-3) Dec. 20, 1995.
American Heritage College Dictionary Definition of Precision.
Merriam-Webster definition of precision.

Affiliated with

Also associated with

Rating

Multi-precision technique for digital audio encoder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-precision technique for digital audio encoder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-precision technique for digital audio encoder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3716949