System and method for optimizing power consumption in voice communications in mobile devices

A system (100) for optimizing power consumption in voice communication in mobile devices, the system (100) comprising:

• a. a microphone (101) configured to receive input speech and convert speech into an electrical signal, wherein the microphone (101) is coupled with the mobile device;
• b. pre-processing modules including, but not limited to, acoustic echo cancellation (102) and noise reduction (103), wherein the echo cancellation module (102) receives speech signals from the microphone (101) and then processed speech sample undergoes noise reduction (103) and the speech samples frame is pipelined to speech encoder (104), wherein the echo cancellation module (102) and noise reduction module (103) is implemented in a DSP/VLIW processor;
• c. a speech encoder module (104) configured to compress/encode speech signals for efficient transmission over wireless channels, wherein the implementation is performed on a CPU with SIMD extensions (104), wherein the encoded signals are transmitted over transmission network (106) via a channel codec encoder (105);
• d. a speech decoder module (108) configured to decompress/decode the received compressed speech signal from a channel codec decoder (107), wherein the speech decoder is implemented on a CPU with SIMD extensions, wherein the speech decoder module (108) is present at receiving end;
• e. post-processing modules including, but not limited to noise reduction (109), wherein the decoded speech samples are processed on a DSP/VLIW core;
• f. the SoC is designed to have CPU with SIMD extensions and DSP/VLIW processing core to have pipelined implementation of the voice communication modules between the two cores;
• and
• g. a speech receiver (110) configured to receive post-processed speech from post-processing module (109), wherein the post-processing module (109) transmits reconstructed speech signals received from the speech decoder module (108).