Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes the steps of obtaining a group reference value corresponding to a plurality of data included in one group through first grouping and external grouping for the first grouping and a difference value corresponding to the group reference value and obtaining the data using the group reference value and the difference value.

 
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< Image taking apparatus

< Depth layer extraction and image synthesis from focus varied multiple images

> Photographing device, photographing method, and program for photographing a plurality of images consecutively by changing an exposure value

> Sound signal processor and method for processing sound signal using the same
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