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LSI with interpretive function and information recording/reproducing equipment using it

A device, interpretation and execution technology, applied in the direction of digital recording/reproduction, program control using stored programs, data recording, etc., can solve the needs of modifying specifications and adding functions that cannot be easily met, cannot be used by optical disc devices, and content Leakage and other issues

Inactive Publication Date: 2003-02-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, such an LSI cannot be used with various optical disc devices based on different standards and different specifications produced by a plurality of manufacturers
Moreover, needs for revised specifications and added functions generated during the development of optical disc devices cannot be easily satisfied
If the modification of specifications and the addition of functions are realized by adding an external ROM, it involves the possible leakage of the contents of the program (software) during the operation of the LSI.
Moreover, there is a danger that the transmission of signals between the CPU and ROM may be observed by a third party

Method used

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  • LSI with interpretive function and information recording/reproducing equipment using it
  • LSI with interpretive function and information recording/reproducing equipment using it
  • LSI with interpretive function and information recording/reproducing equipment using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 An optical disc device 100 according to Embodiment 1 of the present invention is shown.

[0041] The optical disc device 100 includes an execution part 120, which is used to execute an interpretation and execution program which can interpret an intermediate code, so as to generate a control command string; and a control part 121, which is used to control the optical disc 1 according to the generated control command string. 14 recording / reproduction of information.

[0042] The execution device 120 includes a RAM 103 for storing an intermediate code 108 ; a ROM 104 for storing the interpretation and execution program 106 capable of interpreting the intermediate code 108 ; and a CPU 102 for controlling the execution of the interpretation and execution program 106 . The RAM 103, ROM 104 and CPU 102 are formed on one chip and function as one LSI. Moreover, the execution device 120 may include a system micro-control computer 105 for controlling the entire optical ...

Embodiment 2

[0084] Next, an LSI according to Embodiment 2 of the present invention and an optical disc apparatus using the LSI are described.

[0085] Figure 11 An LSI 1101 according to Embodiment 2 of the present invention is shown. The structure of the LSI 1101 according to Embodiment 2 is basically the same as that of the LSI 101 used in the optical disc apparatus 100 according to Embodiment 1. The same reference numerals designate the same elements, and their descriptions are omitted.

[0086] In the LSI 1101 of Embodiment 2, a RAM 103 has an accessible RAM area 1104 which can be accessed by a system control microcomputer, and an inaccessible RAM area 1105 which cannot be accessed by the system control microcomputer. In Embodiment 2, a previously encrypted intermediate code 1102 is stored in the accessible RAM area 1104, and the encrypted intermediate code 1102 is decrypted in the first step. The decrypted intermediate code is stored in the inaccessible RAM area 1105 as a decrypte...

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Abstract

An LSI comprises: a RAM for storing an intermediate code; a ROM for storing an interpreter execution program that is capable of interpreting the intermediate code; and a CPU for controlling execution of the interpreter execution program, wherein the RAM, the ROM, and the CPU are formed on one chip.

Description

field of invention [0001] The present invention relates to an LSI having an interpretation function, and an information recording / reproducing apparatus using this LSI. Specifically, the present invention relates to an LSI comprising a RAM for storing an intermediate code, a ROM for storing an interpreter execution program to interpret the intermediate code, and a CPU for controlling execution of the interpreter execution program; and An optical disc device using such an LSI. technical background [0002] In order to allow an LSI incorporating a CPU to perform its operations, the CPU is required to execute software (an execution program). In a conventional LSI, software for executing its operation is stored in advance in a memory such as a ROM or the like. When the LSI performs its operation, the CPU reads software from the ROM. [0003] In the conventional LSI described above, only software stored in ROM in advance can be executed, and free modification of software stored...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B20/12
CPCG11B20/00086G11B20/00775G11B20/0021G11B20/10G11B2020/1259G11B20/00224
Inventor 佐藤孝広薮野寛之臼井誠伊藤基志
Owner PANASONIC CORP