Patent ID: 7593853

Claim:
A baseband modem comprising: an audio codec to modulate a voice signal using a first sampling rate or a second sampling rate; means for speech recognition; means for speech encoding, wherein the audio codec is to encode the voice signal using the first sampling rate and the speech recognition means is for performing speech recognition of the encoded voice signal, if the voice signal is a voice command, and the audio codec is to encode the voice signal using the second sampling rate and the speech encoding means is for performing vocoding of the encoded voice signal, if the voice signal is voice communication, and wherein the means for speech recognition comprises: a feature vector extraction block to extract at least one feature vector from the encoded voice signal and a speech recognition block to perform speech recognition using the at least one feature vector extracted by the feature vector extraction block; and a controller to determine whether the voice signal is a voice command or a voice communication and to power on registers of the feature vector extraction block and speech recognition block, if the voice signal is a voice command, and to power off registers of the feature vector extraction block and speech recognition block, if the voice signal is a voice communication.