1. A computer-implemented method, comprising: receiving an audio input and a facial image sequence for a period of time at an electronic device, the audio input including a decipherable portion and an indecipherable portion; converting the decipherable portion of the audio input into a first symbol sequence portion, the converting including: detecting separations between spoken words in the decipherable segment based on the facial image sequence, and processing the decipherable portion into the first symbol sequence portion based in part on the detected separations; processing a portion of the facial image sequence that corresponds temporally to the indecipherable portion of the audio input into a second symbol sequence portion; and integrating the first symbol sequence portion and the second symbol sequence portion in temporal order to form a symbol sequence.
1. A computer-implemented method, comprising: receiving an audio input and a facial image sequence for a period of time at an electronic device, the audio input including a decipherable portion and an indecipherable portion; converting the decipherable portion of the audio input into a first symbol sequence portion, the converting including: detecting separations between spoken words in the decipherable segment based on the facial image sequence, and processing the decipherable portion into the first symbol sequence portion based in part on the detected separations; processing a portion of the facial image sequence that corresponds temporally to the indecipherable portion of the audio input into a second symbol sequence portion; and integrating the first symbol sequence portion and the second symbol sequence portion in temporal order to form a symbol sequence. 6. The computer-implemented method of claim 1 , further comprising determining that speech input is initiated when the facial image sequence indicates that a particular speaker begins to utter sounds.