Encoder and decoder

摘要

Provided are bitstream encoding/decoding methods and devices. The decoder includes: a condition information extracting unit creating recognition information using syntax tree information indicating a hierarchical structure between syntax elements corresponding to bits of an input bitstream, respectively and rule description information indicating connectivity between the syntax elements; and a decoding unit decoding data contained in the bitstream into moving image data using the recognition information. Accordingly, it is possible to decode bitstreams encoded in a variety of types (syntax, semantics) corresponding to a variety of standards (for example, MPEG-1, MPEG-2, MPEG-4, and MPEG-4 AVC) by the use of the same information recognition method.

主权项

1. A decoder comprising:
an input configured to receive a bitstream created by an encoder, wherein the bitstream includes rule description information; a condition information extracting unit configured to create recognition information using syntax tree information indicating a hierarchical structure between syntax elements corresponding to bits of the bitstream, respectively, and the rule description information, wherein the rule description information indicates connectivity between the syntax elements, and includes connectivity information and branch information between group elements indicating layers and information elements constituting a corresponding group; and a decoding unit configured to decode data contained in the bitstream into moving image data using the recognition information, wherein the syntax tree information indicates a hierarchical dependence between a plurality of group elements and a plurality of information elements, wherein the recognition information includes syntax information corresponding to the bits of the bitstream and semantics corresponding to the syntax information, wherein the syntax information includes at least one of a syntax order, a syntax length, and a syntax data type, and wherein branch information changes an information element connected to a current information element depending on satisfaction of a predetermined condition.