Encoding method and encoding apparatus for b-transform, and encoded data for same

The apparatus of claim 8, wherein the diagonal direction is at −45°.

A method for encoding input data comprising:

• performing a B-transform on the input data to generate a binary expression;
• and
• performing an encoding by removing one or more binary symbols from the binary expression and scanning the binary expression with the one or more binary symbols removed to generate a bitstream.

Encoded data generated from encoding input data by an encoding apparatus, the encoded data comprising:

• a step count field containing a B-transform step count;
• and
• a data field containing a bitstream generated by removing one or more binary symbols from and performing a scanning with respect to a binary expression generated from B-transforming the input data as much as the B-transform step count.

An apparatus for encoding input data based on contexts comprising:

• a context analyzer for analyzing a correlation between samples of data in binary symbol expression from the input data being transformed to determine a context of the samples;
• and
• an encoder for encoding the samples according to the context determined to generate a bitstream.

A method for encoding input data based on contexts comprising:

• analyzing a context by analyzing a correlation between samples of data in binary symbol expression from the input data being transformed to determine a context of the samples;
• and
• encoding the samples according to the context determined to generate a bitstream.

An apparatus for analyzing a context for encoding by selecting a sample for determining the context from a table for presenting samples in binary symbol expression from uniform distribution data, detecting a binary symbol of an upper right sample of the sample selected in the table, and determining the binary symbol detected, as a context of the sample selected.