| US 7,500,018 B2 | ||
| Efficient in-band signaling for discontinuous transmission and configuration changes in adaptive multi-rate communications systems | ||
| Stefan Hakansson, Lulea (Sweden); Peter Blocher, Nuremberg (Germany); Stefan Bruhn, Sollentuna (Sweden); and Karl Hellwig, Wonfurt (Germany) | ||
| Assigned to Telefonaktiebolaget L M Ericsson (PUBL), Stockholm (Sweden) | ||
| Filed on Oct. 01, 2003, as Appl. No. 10/676,342. | ||
| Application 10/676342 is a continuation of application No. 09/444368, filed on Nov. 22, 1999, abandoned. | ||
| Claims priority of provisional application 60/109694, filed on Nov. 24, 1998. | ||
| Prior Publication US 2004/0062274 A1, Apr. 01, 2004 | ||
| Int. Cl. G06F 15/173 (2006.01); H04J 3/16 (2006.01) | ||
| U.S. Cl. 709—246 [709/224; 370/468; 370/435; 704/200] | 29 Claims |
| 1. A method for performing discontinuous transmission (DTX) in an adaptive multi-rate (AMR) communications system in which
source data is channel encoded and interleaved for transmission from a first component in the system to a second component
in the system, the method comprising the steps of:
detecting by the first component in the AMR communications system, periods of source data inactivity; and
transmitting silence descriptor (SID) frames from the first to the second component during the periods of source data inactivity,
wherein the SID frames comprise codec mode information; and
wherein source data frames are block diagonally interleaved and certain of the SID frames are block interleaved.
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