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采用仅有移位和加法操作的提升步长的双正交DCT变换来实现H.263视频压缩编码中的DCT变换。双正交DCT能快速有效地实现整数到整数的变换,在C6201定点DSP中,双正交DCT的编码速度与DCT相比有很大提高。
The DCT transform in H.263 video compression coding is achieved using biorthonormal DCT transforms of the shift steps with only shift and addition operations. Biorthogonal DCT can quickly and effectively achieve the integer to integer transform, in C6201 fixed-point DSP, bi-orthogonal DCT coding speed compared with DCT has greatly improved.