Patent ID: 6360202
Filing Date: 2002-03-19
Classification: G11B,H04N

Abstract:
For use with an audiovisual display system in which an original set of audio data and a related original set of video data can be used to generate an audiovisual display at a normal display rate, a method for enabling the apparent display rate of the audiovisual display to be varied from the normal display rate, the method comprising the steps of:defining a correspondence between the original set of audio data and the original set of video data such that the original set of audio data is synchronized with the original set of video data; determining a target display rate or rates for the audiovisual display; creating a modified set of audio data, based upon the target display rate or rates and an evaluation of the content of the original set of audio data, that corresponds to the original set of audio data, wherein the step of creating a modified set of audio data further comprises the steps of: identifying a first group of one or more audio samples of the original set of audio data that is adjacent to a second group of one or more audio samples from the original set of audio data that represents a corresponding pitch pulse or pulses that approximate to a predetermined degree the pitch pulse or pulses represented by the first group of audio samples; and blending the audio samples from the first and second groups of audio samples to produce a third group of one or more audio samples that replaces, or is added to, the first and second groups of audio samples; and creating a modified set of video data, based upon the modified set of audio data, the correspondence between the modified set of audio data and the original set of audio data, and the correspondence between the original set of audio data and the original set of video data, such that the modified set of video data is synchronized with the modified set of audio data.