| 摘要 |
FIELD: physics, computer engineering.SUBSTANCE: invention encoding and decoding digital media data. Disclosed is a method of encoding digital image data with chroma position information which contains defined rules for reporting and interpreting chroma position. A short rule defines 15 discrete chroma centring positions and a corresponding 4-bit syntax element. An extended rule defines 81 discrete chroma centring positions and corresponding 7-bit syntax elements. The disclosed method includes receiving digital media data by a digital media encoder, determining chroma position information for the received digital media data, and representing the chroma position information with one or more syntax elements in an encoded bitstream. The one or more syntax elements are capable of reporting the chroma position information to a digital media decoder, and the chroma position information facilitates an image rotation or flip.EFFECT: high efficiency of encoding/decoding chroma position information.24 cl, 2 tbl, 7 dwg |
