Coding method, coding appartaus, decoding method, decoding apparatus, program, and recording medium

A coding apparatus for an integer value sequence,

• wherein [1] codes corresponding to integers (referred to as specified integers hereinafter) and [2] codes (referred to as extension codes hereinafter) corresponding to sets of a plurality of integers other than the specified integers are previously determined, and
• the coding apparatus comprises a coding part that performs coding in such a manner that the code corresponding to the specified integer is adopted as the result of the coding in a case where an integer value to be coded in the integer value sequence is the specified integer, and a code obtained by combining the extension code and a code obtained by applying a predetermined coding method corresponding to the extension code to the integer value to be coded is adopted as the result of the coding in a case where the integer value to be coded in the integer value sequence is not the specified integer.

A decoding method for a code sequence,

• wherein [1] codes corresponding to integers (referred to as specified integers hereinafter) and [2] codes (referred to as extension codes hereinafter) corresponding to sets of a plurality of integers other than the specified integers are previously determined, and
• the decoding method comprises a decoding step of performing decoding in such a manner that in a case where a code in the code sequence is the code corresponding to the specified integer, the specified integer corresponding to the code is adopted as the result of the decoding, and in a case where a code in the code sequence is not the code corresponding to the specified integer, an integer value obtained by applying a decoding method corresponding to a predetermined coding method corresponding to the extension code (referred to as an extension coding method hereinafter) to a code subsequent to the extension code is adopted as the result of the decoding.

A decoding apparatus for a code sequence,

• wherein [1] codes corresponding to integers (referred to as specified integers hereinafter) and [2] codes (referred to as extension codes hereinafter) corresponding to sets of a plurality of integers other than the specified integers are previously determined, and
• the decoding apparatus comprises a decoding part that performs decoding in such a manner that in a case where a code in the code sequence is the code corresponding to the specified integer, the specified integer corresponding to the code is adopted as the result of the decoding, and in a case where a code in the code sequence is not the code corresponding to the specified integer, an integer value obtained by applying a decoding method corresponding to a predetermined coding method corresponding to the extension code (referred to as an extension coding method hereinafter) to a code subsequent to the extension code is adopted as the result of the decoding.

A coding method for an integer value sequence,

• wherein a plurality of code tables are previously determined in which [1] codes corresponding to integers (referred to as specified integers hereinafter) and [2] codes (referred to as extension codes hereinafter) corresponding to sets of a plurality of integers other than the specified integers are recorded, and
• the coding method comprises a coding step of performing coding in such a manner that the code corresponding to the specified integer is adopted as the result of the coding in a case where an integer value to be coded in the integer value sequence is the specified integer, and a code obtained by combining the extension code and a code obtained by applying a predetermined coding method corresponding to the extension code (referred to as an extension coding method hereinafter) to the integer value to be coded is adopted as the result of the coding in a case where the integer value to be coded in the integer value sequence is not the specified integer, in the coding step one of the plurality of code tables is selected and used for each frame of a predetermined number of integer values.

A coding apparatus for an integer value sequence,

• wherein a plurality of code tables are previously determined in which [1] codes corresponding to integers (referred to as specified integers hereinafter) and [2] codes (referred to as extension codes hereinafter) corresponding to sets of a plurality of integers other than the specified integers are recorded, and
• the coding apparatus comprises a coding part that performs coding in such a manner that the code corresponding to the specified integer is adopted as the result of the coding in a case where an integer value to be coded in the integer value sequence is the specified integer, and a code obtained by combining the extension code and a code obtained by applying a predetermined coding method corresponding to the extension code to the integer value to be coded is adopted as the result of the coding in a case where the integer value to be coded in the integer value sequence is not the specified integer, the coding part selecting and using one of the plurality of code tables for each frame of a predetermined number of integer values.