Patent ID: 6122433
Filing Date: 2000-09-19
Classification: H04N

Abstract:
A method for deriving MPEG compatible digital image representative signals for record formatting to facilitate reproduction at more than one speed, said method comprising the steps of:a) receiving a digital image representative signal;b) temporally sub-sampling said digital image representative signal to generate a first signal having a first frame rate related to a first trick play speed and a second signal having a second frame rate related to a second trick play speed different than said first trick play speed;c) respectively encoding said first and second signals having said first and second frame rates related to said first and second trick play speeds to produce first and second trick play speed MPEG compatible signals;d) respectively storing said first and second trick play speed MPEG compatible signals;e) encoding and storing said digital image representative signal to produce a normal play speed MPEG compatible signal;f) retrieving said first stored trick play speed MPEG compatible signal, said second stored trick play speed MPEG compatible signal and said normal play speed MPEG compatible signal;g) multiplexing said retrieved normal play speed MPEG compatible signal and said retrieved first and second trick play speed MPEG compatible signals to format a new bit stream that facilitates image reproduction at said normal play speed and at each of said trick play speeds; and,h) recording said new bit stream.