| 摘要 |
A graphics processing device for converting coefficients in a video data stream from a first type, e.g., frequency-domain, to a second type, e.g., color-domain. The device includes an input for receiving the video data stream including a set of coefficients of the first type and a storage medium holding a data structure containing a first set of coefficients of the second type. The device further includes a processor communicating with the input and with the storage medium. The processor uses the data structure to convert the set of coefficients of the first type to a second set of coefficients of the second type. The device also includes an output in communication with said processor, for releasing an output video data stream including the second set of coefficients of the second type. The same data structure is used repeatedly for each incoming set of coefficients of the first type, thus allowing a transform, such as an IDCT, to be computed efficiently.
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