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Signal reproducing apparatus and method, signal recording apparatus and method, signal receiver and information processing method

A signal regeneration and signal technology, applied in recording signal processing, recording information storage, combined recording, etc., can solve the problem of not knowing the signal quality, it is difficult to decide whether to purchase, etc., to eliminate the possibility of illegal decryption.

Inactive Publication Date: 2003-11-19
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] In a low quality (sound or image quality) trial / listening situation, it is difficult to decide whether to buy without knowing the signal quality that can be enjoyed after purchase

Method used

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  • Signal reproducing apparatus and method, signal recording apparatus and method, signal receiver and information processing method
  • Signal reproducing apparatus and method, signal recording apparatus and method, signal receiver and information processing method
  • Signal reproducing apparatus and method, signal recording apparatus and method, signal receiver and information processing method

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Embodiment Construction

[0078] Before explaining the embodiments of the present invention, an optical recording / reproducing apparatus as a typical compressed data recording / reproducing apparatus for explaining the embodiments of the present invention will be described first with reference to the drawings.

[0079] figure 1 is a block diagram showing a typical optical disc recording / reproducing apparatus. First, in figure 1 In the shown apparatus, a magneto-optical disk 1 rotationally driven by a spindle motor 51 is used as a recording medium. When recording data on the magneto-optical disc 1, for example, when the optical head 53 projects a laser beam, the magnetic head 54 applies a modulated magnetic field corresponding to the data to be recorded, thereby performing so-called magnetic field modulation recording so as to follow the recording track of the magneto-optical disc 1 Record data. When data is reproduced, the recording track of the magneto-optical disk 1 is traced with a laser beam from t...

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PUM

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Abstract

A signal (801) of a first code string made through replacing a part of a code string of a predetermined format with dummy data is sent to code string rewriting means (1802) via code string resolution means (1801). A signal (806) of a second code string for complementing the dummy data part in the signal (801) is sent to the code string rewriting means (1802) via control means (1805) and the dummy data in the first code string is rewritten to the second code string. At the time of trial viewing / listening, a signal (802) from the code string resolution means (1801) is selected by a switch (1808), and when the second code string (806) is acquired through content purchase, a signal (803) from the code string rewriting means (1802) is selected by the switch (1808). Thus, trial viewing / listening of a content such as music is made possible while the possibility of decryption is eliminated. By acquiring a relatively small quantity of data, reproduction of a high-quality content is made possible.

Description

technical field [0001] The present invention relates to a signal reproducing apparatus and method, a signal recording apparatus and method, a signal receiving apparatus and an information processing method, for example, by encoding a signal for trial viewing / hearing, and if the trial viewer / listener decides to purchase the signal, by A signal reproduction device and method capable of reproducing or recording a high-quality signal by adding a small amount of data information to a signal, a signal recording device and method, a signal receiving device, and an information processing method. Background technique [0002] Content (software) distribution methods are well known, such as encrypting an audio signal and then broadcasting or recording it on a recording medium so that only persons who purchase a decryption key can listen to the signal. [0003] For example, as an encryption method, a method is known in which an initial value of a random number sequence is used as a key ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/92G06F21/10G07F17/16G10K15/02G10L19/00G10L19/02G11B20/00G11B20/10G11B20/12G11B27/034G11B27/10G11B27/30H03M7/30H04N7/24H04N21/2343H04N21/2347H04N21/462H04N21/4627H04N21/472H04N21/81H04N21/8549
CPCG06Q20/1235G06Q30/06H04N21/234354H04N21/8113G11B20/0071G11B27/105G11B20/00123H04N21/234345G11B20/00224G07F17/0014G06Q20/12H04N21/8549G11B27/3063G11B2220/2545H04N21/23476H04N21/4621G11B20/00818G11B2220/2525G11B20/00086G11B27/034H04N21/47211H04N21/4627G11B2220/20G11B2220/41G11B20/10527G11B2220/216G11B20/00978G06Q20/123G11B20/00007G11B20/005G11B2020/1288
Inventor 筒井京弥吉田忠雄赤桐健三羽田直也
Owner SONY CORP
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