ADPCM transcoder

Details ADPCM transcoder ADPCM transcoder

1997-09-30

2000-04-25

Pham, Chi H.

Pulse or digital communications

Pulse code modulation

Differential

375222, 341 76, H04B 1406, H04B 1302, H03M 730

Patent

active

060552751

ABSTRACT:
Known ADPCM transcoders use processors for coding and decoding, which are time and power consuming. Such a known ADPCM transcoder comprising one processor for coding and decoding can handle four channels, while according to DECT twelve channels need to be available, which requires three known ADPCM transcoders. By delaying signals in an ADPCM transcoder, it is no longer necessary to use processors, but, instead of said processors, logic elements can be used, which is very advantageous, because of such an ADPCM transcoder being able to handle sixteen channels.

REFERENCES:
patent: 4654863 (1987-03-01), Belfield et al.
patent: 5334977 (1994-08-01), Kato
patent: 5384807 (1995-01-01), Yatim et al.
patent: 5629976 (1997-05-01), Loke et al.
patent: 5796731 (1998-08-01), Mellado et al.
ITU-T Recommendation G. 726-Annex A: "40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM). Annex A: Extensions of Recommendation G. 726 for Use with Uniform-Quantized Input and Output", Nov. 1994.
ITU-T Recommendation Appendix III (Rec. G. 726) and Appendix II (Rec. G. 727: "Comparison of ADPCM Algorithms", May 1994.
CCITT Recommenation G. 727: 5-, 4-, 3- and 2-bits Sample Embedded Adaptive Differential Pulse Code Modulation (ADPCM). 1990.

Affiliated with

Also associated with

Rating

ADPCM transcoder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with ADPCM transcoder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ADPCM transcoder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-999655