Moving picture coding apparatus and computer program product

An apparatus for coding a moving picture, comprising:

• an adaptive mode selecting unit that selects at least one coding mode in which a coding is performed based on a type of an input image obtained from an interlaced moving picture;
• a prediction unit that generates a prediction signal for each selected coding mode from the input image and a reference image to generate a prediction error signal indicating a difference between a signal of the input image and the prediction signal for each coding mode;
• a tentative coding unit that performs a part of the coding on the prediction error signal for each selected coding mode to calculate a bitrate for each coding mode;
• a coding mode control unit that calculates a coding cost based on the bitrate to determine a coding mode among the selected coding modes based on the coding cost;
• a coding structure deciding unit that decides one of frame coding structure and field coding structure based on the coding cost;
• and
• a coding unit that performs coding according to the determined coding mode on the prediction error signal with the decided coding structure.

An apparatus for coding a moving picture, comprising:

• a prediction unit that generates a prediction signal for each coding mode from an input image obtained from an interlaced moving picture, and a reference image to generate a prediction error signal indicating a difference between a signal of the input image and the prediction signal for each coding mode;
• a coding cost calculating unit that calculates a coding cost for each coding mode based on the prediction error signal;
• a coding mode control unit that determines the coding mode based on the coding cost;
• a coding structure deciding unit that decides one of frame coding structure and field coding structure based on the coding cost;
• and
• a coding unit that performs coding according to the determined coding mode on the prediction error signal with the decided coding structure.

An apparatus for coding a moving picture, comprising:

• a prediction unit that generates a prediction signal for each coding mode from an input image obtained from an interlaced moving picture, and a reference image to generate a prediction error signal indicating a difference between a signal of the input image and the prediction signal for each coding mode;
• a tentative coding unit that performs a part of the coding on the prediction error signal for each coding mode to calculate a bitrate for each coding mode;
• a coding mode control unit that calculates a coding cost based on the bitrate to determine the coding mode based on the coding cost;
• a coding structure deciding unit that decides one of frame coding structure and field coding structure based on the coding cost;
• and
• a coding unit that performs coding according to the determined coding mode on the prediction error signal with the decided coding structure.

A computer program product having a computer readable medium including programmed instructions for coding a moving picture, wherein the instructions, when executed by a computer, cause the computer to perform:

• generating a prediction signal for each coding mode from an input image and a reference image;
• generating a prediction error signal indicating a difference between a signal of the input image and the prediction signal, the input image being obtained from an interlaced moving picture;
• calculating a first coding cost based on the prediction error signal for each coding mode;
• selecting a candidate coding mode based on the first coding cost;
• calculating a bitrate for each coding mode by performing a part of the coding on the prediction error signal for each first coding cost;
• calculating a second coding cost based on the bitrate;
• determining a coding mode among candidate coding modes based on the second coding cost;
• deciding one of frame coding structure and field coding structure based on the second coding cost;
• and
• performing coding according to the determined coding mode on the prediction error signal with the decided coding structure.

A computer program product having a computer readable medium including programmed instructions for coding a moving picture, wherein the instructions, when executed by a computer, cause the computer to perform:

• selecting at least one coding mode in which a coding is performed based on a type of an input image obtained from an interlaced moving picture;
• generating a prediction signal for each selected coding mode from the input image and a reference image;
• generating a prediction error signal indicating a difference between a signal of the input image and the prediction signal for each coding mode;
• performing a part of the coding on the prediction error signal for each selected coding mode;
• calculating a bitrate for each coding mode;
• calculating a coding cost based on the bitrate;
• determining a coding mode among the selected coding modes based on the coding cost;
• deciding one of frame coding structure and field coding structure based on the coding cost;
• and
• performing coding according to the determined coding mode on the prediction error signal with the decided coding structure.

A computer program product having a computer readable medium including programmed instructions for coding a moving picture, wherein the instructions, when executed by a computer, cause the computer to perform:

• generating a prediction signal for each coding mode from an input image obtained from an interlaced moving picture, and a reference image;
• generating a prediction error signal indicating a difference between a signal of the input image and the prediction signal for each coding mode;
• calculating a coding cost for each coding mode based on the prediction error signal;
• determining the coding mode based on the coding cost;
• deciding one of frame coding structure and field coding structure based on the coding cost;
• and
• performing coding according to the determined coding mode on the prediction error signal with the decided coding structure.

A computer program product having a computer readable medium including programmed instructions for coding a moving picture, wherein the instructions, when executed by a computer, cause the computer to perform:

• generating a prediction signal for each coding mode from an input image obtained from an interlaced moving picture, and a reference image;
• generating a prediction error signal indicating a difference between a signal of the input image and the prediction signal for each coding mode;
• performing a part of the coding on the prediction error signal for each coding mode;
• calculating a bitrate for each coding mode;
• calculating a coding cost based on the bitrate to determine the coding mode based on the coding cost;
• deciding one of frame coding structure and field coding structure based on the coding cost;
• and
• performing coding according to the determined coding mode on the prediction error signal with the decided coding structure.