Patent ID: 6788347
Filing Date: 2004-09-07
Classification: G06T,H04N

Abstract:
A digital video signal conversion system for decoding and reformatting a baseband encoded digital video signal which sequentially represents first and second video display formats to produce a decoded video signal suitable for display in a predetermined video display format, each video display format having an aspect ratio and a resolution, the system comprising:a digital video signal decoder including: an input terminal coupled to receive the encoded digital video signal; data retrieval circuitry which extracts from the encoded digital video signal an indication of the video display format for the decoded video signal; and signal processing circuitry which decodes the encoded digital video signal to produce an output video signal, wherein the decoder is responsive to a control signal to process the encoded digital video signal according to respective first and second down conversion processes to produce an output signal in the predetermined video display format from encoded digital video signals in the respective first and second video display formats; and a controller, coupled to receive data which identifies the extracted video display format, the controller producing control signals for the digital video signal decoder which cause the decoder to convert the encoded digital video signal corresponding to the extracted display format into the output video signal having the predetermined video display format in both the first and second intervals; wherein the encoded digital video signal is encoded using a frequency-domain transform operation and the digital video signal decoder includes a low-pass filter which operates on the frequency domain coefficient of the frequency-domain transformed digital video signal to cause the digital video signal decoder to produce a decoded digital video signal having a resolution less than a resolution specified by the extracted video display format.