Patent ID: 7653253
Filing Date: 2010-01-26
Classification: H04N

Abstract:
1. A moving image decoder decoding stream data obtained by processing a moving image signal by DCT (discrete cosine transform), quantizing the processed moving image signal and processing the quantized moving image signal by entropy encoding, to regenerate an image, the moving image decoder comprising: decoding means for processing the stream data by entropy decoding and obtaining a quantized DCT coefficient; detecting means for detecting processing load in the moving image decoder; inverse quantizing means for, if the processing load detected by the detecting means is smaller than a preset threshold value, inverse quantizing the DCT coefficient output by the decoding means by first inverse quantization and, if the processing load detected by the detecting means is equal to or greater than the preset threshold value, inverse quantizing the DCT coefficient output by the decoding means by second inverse quantization in which processing load is smaller than the first inverse quantization; and regenerating means for regenerating an image by executing image prediction in accordance with an output of the inverse quantizing means.