| US 7,486,207 B2 | ||
| Method and device for changing an encoding mode of encoded data streams | ||
| Luigi D'Antonio, Rome (Italy); and Andrea Ambrosioni, Espoo (Finland) | ||
| Assigned to Telefonaktiebolaget L M Ericsson (Publ), Stockholm (Sweden) | ||
| Filed on Dec. 05, 2005, as Appl. No. 11/275,041. | ||
| Prior Publication US 2006/0159185 A1, Jul. 20, 2006 | ||
| Int. Cl. H03M 7/34 (2006.01) | ||
| U.S. Cl. 341—51 [341/55; 341/60; 341/61; 341/82; 341/107; 375/240.12; 375/240.16; 375/240.23; 375/240.25; 375/240.03] | 26 Claims |
| 1. A method for changing an encoding mode of an encoded data stream from a first encoding mode to a second encoding mode,
the encoded data stream at the first encoding mode being represented by first encoding parameters, the method comprising the
steps of
selecting a first set of the first encoding parameters to be used unchanged at the second encoding mode,
selecting a second set of the first encoding parameters,
changing the second set according to an algorithm being adapted to change the second set to match to the second encoding mode
when combined with the first set the algorithm using a target signal for a fixed codebook search, the target signal being
derived from at least one of the encoding parameters of the first set, and
Combining the first set and the changed second set for representing the encoded data stream by second encoding parameters
at the second encoding mode.
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