In general, this disclosure sets forth scanning techniques useful in the context of sub-band coding, which may improve the level of compression that can be achieved by entropy coding following sub-band coding.
An electronic device for reconstructing a lost packet in a Sub-Band Coding (SBC) decoder is described.
A plurality of sub-band signals of a sub-band encoded input signal is obtained; preferably by de-multiplexing of the corresponding bitstream.
A set of sub-band signals is filtered by a sub-band filter (507) which has a response associated with the watermark.
An image compression scheme called vector subband coding (VSC) employs a vector-based operation in coding images.
This property makes the subsequent VQ operation much more efficient and allows large coding gain over conventional subband coding.
One embodiment of the present invention relates to a method and a device for subband coding a frequency conversion unit, and to a method and a device for image encoding/decoding using same.
The sub-band filter (507) thereby generates a set of filtered sub-band signals which are combined into an output signal having the desired watermark.
Watermarks (w[n]) are embedded into the sub-band signals (xi-1[n], xi[n],xi+1[n]) of at least one selected sub-band of a compressed bit-stream (bk) using a watermark inserting unit (18).
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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