Audio based methods and apparatus for detecting a channel change event

An apparatus, comprising:

• a processor;
• and
• a memory storing instructions which, when executed by the processor, cause the processor to:
• identify at least one of a first muted audio condition or a first transient audio condition in a second portion of a media signal having first, second, and third portions, the first portion occurring earlier in time than the second portion and the second portion occurring earlier in time than the third portion;
• and
• identify, using a processor, a channel change event in response to:
• 1) identifying the at least one of the first muted audio condition or the first transient audio condition;
• 2) failing to identify a second muted audio condition or a second transient audio condition in the first and third portions of the media signal;
• and
• 3) determining that a time domain length of the second portion of the media signal is greater than a first threshold and less than a second threshold.

A tangible computer readable storage medium comprising computer readable instructions which, when executed, cause a computer to at least:

• identify at least one of a first muted audio condition or a first transient audio condition in a second portion of a media signal having first, second, and third portions, the first portion occurring earlier in time than the second portion and the second portion occurring earlier in time than the third portion;
• and
• identify a channel change event in response to:
• 1) identifying the at least one of the first muted audio condition or the first transient audio condition;
• 2) failing to identify a second muted audio condition or a second transient audio condition in the first and third portions of the media signal;
• and
• 3) determining that a time domain length of the second portion of the media signal is greater than a first threshold and less than a second threshold.