Patent ID: 6266817
Filing Date: 2001-07-24
Classification: G06T,H04N

Abstract:
A decoder that receives a network-transmittable server generated single embedded bit stream in pixel blocks that contains information for at least two spatial resolutions of video, said server encoding said embedded bit stream using discrete cosine transformation followed by tree-structured quantization, said decoder outputting from said bit stream scaleable video that is variable in at least one of spatial resolution, temporal resolution, and data rate, the decoder including:a central processor unit coupled to a memory unit;a look-up table, stored in said memory unit, including preprocessed decoded versions of quantized indexable representations of inverse discrete cosine transforms of image data used when codewords present in said embedded bit stream were created; anda processor controlled by said central processor unit that processes said information contained in said embedded bit stream and decodes at least a first spatial resolution image by decompressing base layer data contained within said embedded bit stream;wherein said decoder can decode a viewable image from data in said embedded bit stream from received codewords containing less than a number of bits representing a full-length codeword.