VC-2 DECODING USING PARALLEL DECODING PATHS

摘要

Methods, devices and systems that perform VC-2 decoding are disclosed. In an embodiment, a VC-2 decoder includes three parallel data paths including top-band, current-band and bottom-band data paths. The top-band data path performs variable length decoding (VLD), inverse-quantization (IQ) and inverse-DC-prediction (IDCP) processing of a top compressed data-band. The current-band data path performs VLD, IQ and IDCP processing of a current compressed data-band. The bottom-band data path performs VLD, IQ and IDCP processing of a bottom compressed data-band. Additionally, the decoder includes a three-level inverse discrete wavelet transform (IDWT) module to perform IDWT processing to synthesize decoded source pixel values in dependence on partially-decompressed top, current and bottom data-bands produced using the three parallel data paths. The decoder also includes a slice-bytes equalizer, a bit-stream first-in-first-out (FIFO), a scan conversion FIFO, and a module that inserts horizontal and vertical blanking periods into data received from the scan conversion FIFO.

主权项

1. A decoder comprising:
three parallel data paths including a top-band data path, a current-band data path, and a bottom-band data path,
the top-band data path to perform variable length decoding (VLD), inverse-quantization (IQ) and inverse-DC-prediction (IDCP) processing of a top compressed data-band;the current-band data path to perform VLD, IQ and IDCP processing of a current compressed data-band; andthe bottom-band data path to perform VLD, IQ and IDCP processing of a bottom compressed data-band; and a three-level inverse discrete wavelet transform (IDWT) module to perform IDWT processing to synthesize decoded pixel values in dependence on partially-decompressed top, current and bottom data-bands produced using the three parallel data paths.