Error mitigation and correction in the delivery of on demand aud

Details Error mitigation and correction in the delivery of on demand aud Error mitigation and correction in the delivery of on demand aud

1996-04-12

1999-06-29

Grant, William

Excavating

369 48, 369 93, 348410, 348390, 348399, H03M 1300

Patent

active

059178353

ABSTRACT:
A method and system for mitigating and compensating for loss of digital audio data transmitted as a stream of packets to a client (30). A server (10) compresses digital audio data corresponding to a digitized analog audio signal. The compressed data are divided into N frames of data per packet. The server interleaves the frames, producing interleave packets of up to order N. The interleave operation minimizes the effect of any lost packet when the interleave packets are received, deinterleaved, and converted to an analog signal that is played on a speaker at the client. Lost frames are replaced using the data from frames that are received. As a further aspect, the frames can be scrambled at the server by applying a permutation function F that depends upon the packet number (PN) and a Key value. At the client, an inverse permutation function F.sup.-1 is applied to unscramble the frames.

REFERENCES:
patent: 3423729 (1969-01-01), Heller
patent: 3544963 (1970-12-01), Tong
patent: 4539684 (1985-09-01), Kloker
patent: 4901319 (1990-02-01), Ross
patent: 4907233 (1990-03-01), Deutsch et al.
patent: 4964128 (1990-10-01), Sako et al.
patent: 5022029 (1991-06-01), Guichon
patent: 5091936 (1992-02-01), Katznelson et al.
patent: 5121395 (1992-06-01), Millar
patent: 5159452 (1992-10-01), Kinoshita et al.
patent: 5243428 (1993-09-01), Challapali et al.
patent: 5257271 (1993-10-01), Lagadec et al.
patent: 5487067 (1996-01-01), Matsushige
patent: 5594490 (1997-01-01), Dawson et al.
Rault et al., "The Coded Orthogonal Frequency Division Multiplexing (COFDM) Technique, And Its Application To Digital Radio Broadcasting Towards Mobile Receivers", IEEE, pp. 12.3.1.-12.3.5, 1989.
Weck, "digital Audion Broadcasting: Optimizing Of A Combined of a combined Concept Of Source And Channel Coding With Respect Of Subjective Criteria", IEEE, pp. 360-363, 1988.

Affiliated with

Also associated with

Rating

Error mitigation and correction in the delivery of on demand aud does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Error mitigation and correction in the delivery of on demand aud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Error mitigation and correction in the delivery of on demand aud will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1382729