Method for protecting DVD recording playback machine with anticopying function

Abstract

The present invention is the protection method for DVD record player with anti-copy function, and the method is realized through connecting a microprocessor to the main chips inside the DVD record player. The microprocessor first generates three bytes set inside a buffer as the data memory inside the microprocessor, these three bytes are then read out the buffer and fed to main chips inside the DVD record player, checking the first place for error and receiving the other places if no error in the first place, returning the three bytes to the microprocessor and checking the correctness of these three bytes at least once. When the returned three bytes are correct, the main chips inside the DVD record player are proved to be correct-plated and recordable.

Description

technical field [0001] The invention is a protection method for a DVD recorder with anti-copy function, which is achieved by connecting a microprocessor to a main chip inside the DVD recorder. Utilize the characteristic that the internal program code cannot be copied after the microprocessor is burned out, cooperate with the method of transmitting three bytes between the microprocessor and the main chip inside the DVD recorder, and detect the correctness of the three bytes way to protect the firmware (Firmware) in the internal chip of the DVD recorder. Background technique [0002] In today's short life cycle of electronic products, many manufacturers try to shorten the product development time and launch process, so some unscrupulous manufacturers use various methods to obtain competitors' hardware products, and directly disassemble the physical circuit board. Gerber (one of the CAD data formats), use the fried method to separate the multi-layer board and hand it over to t...

AI Technical Summary

Problems solved by technology

However, due to the high unit price of the EEPROM, most manufacturers will remove the EEPROM from the circuit board in order to reduce the manufacturing cost, and store the activation program code and the core program code in the in cache

[0004] Nowadays, the method of storing firmware directly in the cache can reduce the manufacturing cost of the manufacturer, but it also creates a very big crisis virtually. This crisis is that the firmware is easy to be copied. Unscrupulous manufacturers only need to disassemble the cache from the original board. Get down and take it to the burning company, use the burner to burn bit by bit into a new cache of the same model, so that a cache with the same content can be reproduced

[0005] According to the above method, unscrupulous manufacturers can easily obtain complete hardware and firmware without spending any research and development costs, and the research and development results of the original development company will be paid for.

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