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Recorded medium reproducing device and method, data output controlling method, data outputting method, error detecting method, and data outputting reproducing method

A technology for recording medium and reproducing device, which is applied in the fields of reproducing device and reproduction, data output control, data output, error detection, and data output and reproduction of recording medium, and can solve the problems of increasing the burden on firmware and the like

Inactive Publication Date: 2006-06-28
SONY CORP
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  • Description
  • Claims
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Problems solved by technology

Therefore, the process of rewriting the watermark puts an additional burden on the firmware

Method used

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  • Recorded medium reproducing device and method, data output controlling method, data outputting method, error detecting method, and data outputting reproducing method
  • Recorded medium reproducing device and method, data output controlling method, data outputting method, error detecting method, and data outputting reproducing method
  • Recorded medium reproducing device and method, data output controlling method, data outputting method, error detecting method, and data outputting reproducing method

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Embodiment Construction

[0050] Best Mode for Carrying Out the Invention

[0051] An embodiment of the present invention will be described below with reference to the drawings. According to this embodiment of the present invention, watermark data is embedded in the content data when the content data is recorded into the recording medium.

[0052] Fig. 1 shows the structure of a watermark embedded in content data. Data of contents (here, audio data of left (L) channel and right (R) channel) are processed one by one at 2 bytes (16 bits) per sample. Watermark data (indicated by the shaded area in Figure 1) is embedded in the least significant bits of the content data. Then, the watermark data is embedded in the content data of one sample of the left channel and one sample of the right channel at a ratio of 2 bits (2 bytes+2 bytes=4 bytes).

[0053] Watermark data is processed by treating 48 bits as one information part (packet). Since the watermark data is embedded in 4 bytes of one sample of the lef...

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Abstract

A reproducing method for a record medium, the reproducing method comprising the steps of performing a demodulating process for data that has been read from a record medium on which data of a content has been recorded, at least management information and additional information being embedded to the data of the content, the management information being with respect to a copy management, the additional information containing at least one of error detection code and error correction code added to the management information, detecting the additional information from an output signal of which the demodulation process has been performed, performing an error detecting process corresponding to one of the error detection code and the error correction code of the detected additional information, and controlling an output operation for an output signal of which the demodulating process has been performed for the data of the content that has been read from the record medium corresponding to the management information when no error takes place in the error detecting process.

Description

technical field [0001] The present invention relates to a reproduction apparatus and reproduction method of a recording medium, a data output control method, a data output method, an error detection method, and a data output and reproduction method suitable for content data in which auxiliary information is embedded. Background technique [0002] In order to protect the copyright of audio content or video content recorded onto a recording medium, a watermark in which copy management information is superimposed and embedded in content data as auxiliary information has been developed. As an example of such a watermark, a method of inserting auxiliary information into lower bits of content data is known. [0003] In order to protect the copyright of audio data, SCMS (Serial Copy Management System) is used as copy management information embedded in content in the form of a watermark. Utilizing SCMS copy management information, not only copy management of free copy operation and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/10G06F3/06G06T1/00G11B20/00G11B20/18H03M13/03
CPCH03M13/03G06T1/0021G11B20/00086G11B20/00884G11B20/1803G11B20/1833G06F3/06
Inventor 佐古矅一郎猪口达也川嶌哲司
Owner SONY CORP
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