JP2006340066A5

JP2006340066A5 -

Info

Publication number: JP2006340066A5
Application number: JP2005162627A
Authority: JP
Filing date: 2005-06-02
Publication date: 2007-08-30

Claims

Dividing the video signal and audio signal for each predetermined section, and feature extraction means that to extract features of the video signal or the audio signal of each section,
And encoding rate determining means for determining a coding rate based on previous Kitoku symptoms of each section,
A moving picture encoding apparatus comprising: encoding means for encoding the video signal and the audio signal at a determined encoding rate.

The moving image coding apparatus according to claim 1, wherein the feature is a feature of a voice extracted from the voice signal .

The encoding rate determining means includes
Feature data generating means for generating feature data representing the voice characteristics of each section and position information of each section;
Feature data analysis means for creating a coding rate map based on the feature data and position information of each section;
Coding rate generation means for generating and outputting data indicating the coding rate of each section based on the coding rate map;
The video coding device according to claim 2, characterized in that it comprises a.

4. The moving image encoding apparatus according to claim 3 , wherein the feature data generating unit generates and holds feature information indicating presence / absence of viewing value based on a physical change amount in the audio signal .

The characteristic data analysis means, the claims when generating the coding rate map from the characteristic data, as coding rate, and sets a value in the range from a predetermined upper limit and the lower limit value the video coding device according to 3.

It further comprises recording means for recording the encoded video signal and audio signal on a recording medium,
The encoding rate generation means includes
Not the encoding rate map only, claim 3, characterized in that to generate the data indicating the coding rate based on the available capacity of the recording medium used for recording the encoded video signal and audio signal The moving image encoding apparatus described in 1.

Video feature extraction means for extracting video features represented by the video signal of each section;
The encoding rate determining means includes
The moving picture encoding apparatus according to claim 2 , wherein an encoding rate is determined based on not only the audio characteristics of each section but also the video characteristics .

8. The moving picture coding apparatus according to claim 7 , wherein the coding rate determining means extracts the video feature based on a physical change amount of the video signal .

It further comprises recording means for recording the encoded video signal and audio signal on a recording medium,
The code rate determining means includes
3. The moving picture encoding apparatus according to claim 2 , wherein the encoding rate is determined according to a free space of the recording medium used for recording the encoded video signal and audio signal .

It further comprises recording means for recording the encoded video signal and audio signal on a recording medium,
When the feature amount representing the feature generated by the feature data generating means has a value equal to or less than a preset threshold value, the recording of the video signal and audio signal in the section to the recording medium is skipped.
The moving picture coding apparatus according to claim 2, wherein:

The feature is a feature of a video extracted from the video signal.
The moving picture coding apparatus according to claim 1, wherein:

The video features are based on the detection of a person or face using an image recognition technique
The moving picture encoding apparatus according to claim 11.

A feature extraction step of dividing the video signal and the audio signal into predetermined intervals and extracting the characteristics of the video signal or the audio signal in each interval;
An encoding rate determining step for determining an encoding rate based on the characteristics of each section;
An encoding step of encoding the video signal and the audio signal at the determined encoding rate;
A video encoding method comprising:

The feature is a feature of the voice extracted from the voice signal in the feature extraction step.
The moving picture encoding method according to claim 13, wherein:

The feature is a feature of the video extracted from the video signal in the feature extraction step.
The moving picture encoding method according to claim 13, wherein:

A first recording step of encoding a video signal and an audio signal supplied from the outside and recording them in a recording means;
An audio feature extraction step of dividing the video signal and the audio signal recorded in the recording means into predetermined intervals, and extracting audio features of the audio signal in each interval;
An encoding rate determining step for determining an encoding rate based on a feature of speech represented by the speech signal of each section;
A reproduction step of reading out and decoding the video signal and the audio signal from the recording means;
A second recording step of encoding the decoded video signal and audio signal at the encoding rate determined in the encoding rate determining step and recording the encoded signal on the recording means;
A recording / reproducing method comprising:

The recording means includes a first recording medium and a second recording medium;
In the first recording step, recording is performed on the first recording medium,
Recording in the second recording medium in the second recording step;
The recording / reproducing method according to claim 16.