Coding least significant bits of picture order count values identifying long-term reference pictures

摘要

In general, techniques are described for coding picture order count values identifying long-term reference pictures. A video decoding device comprising a processor may perform the techniques. The processor may be configured to determine a number of bits used to represent least significant bits of the picture order count value that identifies a long-term reference picture to be used when decoding at least a portion of a current picture and parse the determined number of bits from a bitstream representative of the encoded video data. The parsed bits represent the least significant bits of the picture order count value. The processor retrieves the long-term reference picture from a decoded picture buffer based on the least significant bits, and decodes at least the portion of the current picture using the retrieved long-term reference picture.

主权项

1. A method of encoding video data, the method comprising:
determining, for a current picture of the video data, a long term reference picture to be used when encoding at least a portion of a current picture of the video data; determining a number of bits to be used to represent one or more least significant bits of a picture order count value that directly identifies the long-term reference picture; specifying, in a bitstream representative of an encoded version of the video data, the one or more least significant bits of the picture order count value using the determined number of bits; determining whether to specify, in the bitstream, one or more most significant bits of a delta of the picture order count value directly identifying the long-term reference picture and a picture order count value directly identifying the current picture; based on the determination of whether to specify the one or more most significant bits, specifying the one or more most significant bits in a slice header of the bitstream; and encoding at least the portion of the current picture using the long-term reference picture.