Memory Format - 2023.2 English

The decoded picture buffer contains the decoded pixels. It contains two parts: luminance pixels (Luma) followed by chrominance pixels (Chroma). Luma pixels are stored in pixel raster scan order. Chroma pixels are stored in U/V-interleaved pixel raster scan order; hence, the Chroma part is half the size of the Luma part when using a 4:2:0 format and the same size as the Luma part when using a 4:2:2 format. The decoded picture buffer must be one contiguous memory region.

Two packing formats are supported in external memory: eight bits per component or 10 bits per component, shown in the following tables, respectively. The 8-bit format can only be used for an 8-bit component depth and the 10-bit format can only be used for a 10- bit component depth. The following tables show the raster scan format supported by the decoder block for 8-bit and 10-bit color depth.

The frame buffer width (pitch) can be larger than the frame width so that there are (pitch - width) ignored values between consecutive pixel lines.