Encoding device and dynamic image recording system having the encoding device
AssigneePanasonic Corporation
InventorHiroki Inagaki
Life of this patent
Estimating the term…
Abstract
To always maintain good image quality no matter whether the target bit rate for encoding is high or low. An encoder 210 includes: a converting section 103 for converting picture data representing a moving picture into a coefficient including a plurality of frequency components on a predetermined unit basis; a determining section 212 for determining a matrix to define a frequency bit allocation characteristic based on the resolution of the moving picture and a target bit rate for encoding that has been specified in advance; a quantization section 204 for quantizing each coefficient based on the matrix determined, thereby generating a quantized value; and an encoding section 105 for encoding the quantized value to generate encoded data of the moving picture.
Claims8
An encoder comprising:
- a converting section for converting picture data representing a moving picture into a coefficient including a plurality of frequency components on a predetermined unit basis;
- a determining section for determining a matrix to define a frequency bit allocation characteristic based on the resolution of the moving picture and a target bit rate for encoding that has been specified in advance;
- a quantization section for quantizing each said coefficient based on the matrix determined, thereby generating a quantized value;
- and
- an encoding section for encoding the quantized value to generate encoded data of the moving picture.
A moving picture recording system comprising:
- a video signal receiving section for receiving a video signal representing a moving picture and outputting picture data to present the moving picture;
- an encoder for outputting encoded data of the moving picture based on the picture data;
- and
- a storage section for writing the encoded data on a storage medium,
- wherein the encoder includes:
- a converting section for converting the picture data into a coefficient including a plurality of frequency components on a predetermined unit basis;
- a determining section for determining a matrix to define a frequency bit allocation characteristic based on the resolution of the moving picture and a target bit rate for encoding that has been specified in advance;
- a quantization section for quantizing each said coefficient based on the matrix determined, thereby generating a quantized value;
- and
- an encoding section for encoding the quantized value to generate encoded data of the moving picture.
Dependencies are inferred from the claim text.