Apparatus, methods, and articles of manufacture for media monitoring are disclosed. In particular, the example apparatus, methods, and articles of manufacture determine a media source type associated with a media signal and select an encoding or decoding mode based on the media source type. An encoding...http://www.google.com.hk/patents/US20080101454?utm_source=gb-gplus-share專利 US20080101454 - VARIABLE ENCODING AND DETECTION APPARATUS AND METHODS
