System and method for supporting multiple speech codecs

A system, comprising:

• a processor capable of performing functions for at least one of encoding and decoding communication signals;
• and
• a co-processor capable of performing a search of a codebook to support at least one of the encoding and decoding of the communication signals, the codebook comprising a plurality of tracks each having a plurality of even pulse positions, the co-processor capable of performing the search by:
• partitioning a codevector comprising a plurality of pulses into a first subset of pulses and a second subset of pulses, each pulse assignable to a pulse position in the codevector, each pulse associated with a shift bit for indicating an odd position;
• performing a first search for determining a first set of possible pulse positions for the pulses in the codevector;
• performing a second search for determining a second set of possible pulse positions for the pulses in the codevector;
• and
• forming the codevector using the first and second sets of possible pulse positions.

A computer program embodied on a computer readable medium and operable to be executed by a processor, the computer program for performing a search of a codebook, the codebook comprising a plurality of tracks each having a plurality of even pulse positions, the computer program comprising computer readable program code for:

• partitioning a codevector comprising a plurality of pulses into a first subset of pulses and a second subset of pulses, each pulse assignable to a pulse position in the codevector, each pulse associated with a shift bit for indicating an odd position;
• performing a first search for determining a first set of possible pulse positions for the pulses in the codevector;
• performing a second search for determining a second set of possible pulse positions for the pulses in the codevector;
• and
• forming the codevector using the first and second sets of possible pulse positions.