![]() In the 4x4 block case, nine prediction types are supported (DC and nine directional spatial prediction modes). Prediction is possible for 4x4, 8x8 and 16x16 blocks, where for the 16x16 and 8x8 cases only horizontal, vertical, DC, and planar prediction is allowed. Intra-picture coding is performed by first predicting the entire block from boundary samples of adjacent blocks.In contrast to previous standards based on the DCT, there is no dependency on a floating point implementation, such that no drift between encoder and decoder picture representations can occur in normal (error-free) operation. For the entire building block of transform and quantization, implementation by 16-bit integer arithmetic precision is possible both for encoding and decoding. The transform design is not exactly a DCT, but could be interpreted as an integer approximation thereof. ![]()
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