JP2003308099A5

JP2003308099A5 -

Info

Publication number: JP2003308099A5
Application number: JP2002114785A
Authority: JP
Filing date: 2002-04-17
Publication date: 2005-09-08

Claims

In the data conversion method of the data conversion apparatus for converting the first data string to generate the second data string,
A data conversion step of converting the first data string to generate the second data string by changing the order of a plurality of frames constituting the first data string;
A generation step of generating a third data string necessary for restoring the second data string generated by the conversion in the data conversion step to the first data string. Data conversion method.

The plurality of frames constituting the first data string are classified into a first frame and a second frame,
In the processing of the data conversion step, the first data string is converted by changing the order so that the first frame is positioned before the second frame, and the second data The data conversion method according to claim 1, wherein the data string is generated.

An encoding step for encoding the input data;
The process of the data conversion step converts the encoded data encoded by the process of the encoding step into the second data string as the first data string. Data conversion method.

In the process of the data conversion step, a process of replacing the first data included in at least one frame among the frames included in the first data string with the second data is further executed. Generate a second data string,
The process of the generation step generates the third data string including the first data replaced with the second data by the process of the data conversion step. Data conversion method.

In a data conversion apparatus that converts a first data string to generate a second data string,
Data conversion means for converting the first data string by changing the order of a plurality of frames constituting the first data string to generate the second data string;
Generation means for generating a third data string necessary for restoring the second data string generated by conversion by the data conversion means into the first data string. Data conversion device.

A program for a data converter that converts a first data string to generate a second data string,
A data conversion step of converting the first data string to generate the second data string by changing the order of a plurality of frames constituting the first data string;
A generation step of generating a third data string necessary for restoring the second data string generated by the conversion in the data conversion step to the first data string. A recording medium on which a computer-readable program is recorded.

A computer-executable program for controlling a data conversion apparatus that converts a first data string to generate a second data string,
A data conversion step of converting the first data string to generate the second data string by changing the order of a plurality of frames constituting the first data string;
A generation step of generating a third data string necessary for restoring the second data string generated by the conversion in the data conversion step to the first data string. Program.

In the data restoration method of the data restoration device for restoring the first data string to the second data string,
An acquisition control step for controlling acquisition of a third data string including information necessary to restore the first data string to the second data string;
Restoration that restores the second data sequence by changing the order of a plurality of frames constituting the first data based on the third data sequence whose acquisition is controlled by the processing of the acquisition control step A data restoration method comprising the steps of:

The plurality of frames constituting the first data string are classified into a first frame and a second frame, and the first frame is arranged to be positioned before the second frame. ,
In the process of the restoration step, the position of the first frame is moved based on the information included in the third data string whose acquisition is controlled by the acquisition control step, and the second data The data restoration method according to claim 8 , wherein a column is restored.

Wherein said second data stream restored by the restoration process step, the data restoring method according to claim 8 you, further comprising a recording control step of controlling recording of the predetermined recording medium.

The data restoration method according to claim 8 , further comprising: a decoding step of decoding the second data string restored by the process of the restoration step.

The first data string is at least partially encrypted;
The third data string includes a decryption key corresponding to the encrypted part of the first data string,
In the process of the restoration step, a process of decrypting at least a part of the first data string using the decryption key included in the third data string whose acquisition is controlled by the acquisition control step. The data restoration method according to claim 8 , further executed.

In the process of the restoration step, the first data included in the third data string whose acquisition is controlled by the acquisition control step is replaced with the second data included in the first data string. The data restoration method according to claim 8 , wherein the second data string is restored.

In the data restoration device for restoring the first data string to the second data string,
Obtaining means for obtaining a third data string including information necessary to restore the first data string to the second data string;
Reconstructing means for reconstructing the second data string by changing the order of a plurality of frames constituting the first data based on the third data string obtained by the obtaining means. A data restoration device characterized by the above.

A program for a data restoration device for restoring a first data string to a second data string,
An acquisition control step for controlling acquisition of a third data string including information necessary to restore the first data string to the second data string;
Restoration that restores the second data sequence by changing the order of a plurality of frames constituting the first data based on the third data sequence whose acquisition is controlled by the processing of the acquisition control step A recording medium on which a computer-readable program is recorded.

A computer-executable program for controlling a data restoration device that restores a first data string to a second data string,
An acquisition control step for controlling acquisition of a third data string including information necessary to restore the first data string to the second data string;
Restoration that restores the second data sequence by changing the order of a plurality of frames constituting the first data based on the third data sequence whose acquisition is controlled by the processing of the acquisition control step A program characterized by including steps.

It is a data format of trial listening data distributed for trial listening to the original content data,
Header information including playback time information of the audition data;
A first frame which is set as a trial listening area and whose reproduction quality is set to be deteriorated from a corresponding portion of the content data;
The second frame that is set so that it cannot be played is included as a non-listening area,
The first frame is arranged to be before the second frame on the time axis during playback,
The header format includes a total playback time of the first frame as the playback time information of the sample data.

A data format of restoration data distributed to restore the audition data for the original content data to the content data,
Header information including a playback time of the content data and position information in the content data of a frame set as a trial listening area in the trial listening data;
Second data replacing at least one first data included in the audition data;
A data format comprising: information necessary for correctly replacing the first data with the second data.