JP2001258004A5

JP2001258004A5 -

Info

Publication number: JP2001258004A5
Application number: JP2000385941A
Authority: JP
Filing date: 2000-12-19
Publication date: 2004-11-18
Anticipated expiration: 2020-12-19

Claims

Separating means for separating input image data into a plurality of layers;
Blocking means for blocking the image data of each layer separated by the separation means,
Block encoding means for encoding each block divided by the blocking means,
In one or more layers, scrambling means for scrambling a block coded by the block coding means,
Protected data input means for inputting protected data for protecting intellectual property;
The block coding encoded code by means, the image coding apparatus characterized by having a multiplexing means and outputting the multiplexed codes of scrambled blocks by the protected data and the scrambling means.

2. The image coding apparatus according to claim 1, wherein the separation unit down-samples the input image data in a two-dimensional space direction.

The apparatus according to claim 1, wherein the separation unit allocates a frame of the input image data for each layer.

4. The image coding apparatus according to claim 1, wherein the scrambling unit replaces the bit stream coded by the block coding unit with another code having the same code length. apparatus.

The block encoding means includes:
Orthogonal transformation means for performing orthogonal transformation on the block,
Quantization means for quantizing each coefficient transformed by the orthogonal transformation means,
The image encoding apparatus according to claim 1, further comprising: a variable-length encoding unit that performs variable-length encoding on a quantization result obtained by the quantization unit.

The image encoding apparatus according to claim 1, wherein the multiplexing unit further multiplexes information indicating whether or not the block includes a block scrambled by the scrambling unit.

Distribution means for receiving an encoded bit stream, distributing the bit stream to one or more layers, and a protection code for protecting intellectual property;
An authentication data input means for inputting authentication data from outside;
Authentication means for checking the matching between the authentication data and the protection code,
Based on the authentication result by the authentication means, descrambling means for descrambling one or more layers,
Decoding means for decoding the output of the separating means or the output of the descrambling means,
Image decoding apparatus characterized by comprising an image output means for outputting the image decoding by the decoding means.

8. The image decoding apparatus according to claim 7, wherein the image output unit assigns and outputs frames of the image in a reproduction order for each layer.

8. The image decoding apparatus according to claim 7, wherein the image output unit selects and outputs an image for each layer.

The image decoding apparatus according to claim 7, wherein the descrambling unit replaces the bit stream with another code having the same code length.

The decoding means,
Input means for inputting the bit stream descrambled by the descrambling means,
Variable length decoding means for performing variable length decoding of the encoded code for each block,
Inverse quantization means for inversely quantizing the decoding result by the variable length decoding means,
The image decoding apparatus according to any one of claims 7 to 10, characterized in that an inverse orthogonal transform means for inverse orthogonal transform and inverse quantization result of the inverse quantization means.

A separation step of separating the input image data into a plurality of layers,
A blocking step of blocking the image data of each layer separated in the separation step,
A block encoding step of encoding each block blocked in the blocking step,
In one or more layers, a scrambling step of scrambling the block encoded by the block encoding step;
A protection data input process for inputting protection data for protecting intellectual property;
Said block encoding step in encoded code image encoding method characterized by having a multiplexing step of outputting the multiplexed codes of scrambled blocks by the protected data and the scrambling process.

A distribution step of receiving an encoded bit stream and distributing the bit stream to a protection code for protecting intellectual property and one or more layers;
An authentication data input step of inputting authentication data from outside,
An authentication step of checking a match between the authentication data and the protection code,
Based on the authentication result in the authentication step, a descrambling step of descrambling one or more layers,
A decoding step of decoding the output of the separation step or the output of the descrambling step,
Image decoding method characterized by comprising an image output step of outputting the decoded picture in the decoding process.

To claim 12 or 13 storing a program for executing the method according readable storage medium by a computer.