Encoding/decoding method and device for digital content

Abstract

The invention relates to an encoding / decoding method and devices for digital content. The object of the invention is to encode a special part for digital multimedia content, thereby the overload of a digital multimedia device can be reduced while maintaining the encoding performance. In order to achieve the object, for the encoding method of digital content, the invention is characterized by including the following several steps: a distinguishing step of distinguishing I, B and P frame for multimedia video data; an encoding step of encoding the distinguished I frame by a special key; a generating step of replacing a multimedia video data I frame by the encoded I frame and generating an encoded multimedia video data.

Description

technical field [0001] The invention relates to encryption technology, in particular to a digital content encryption and decryption method and device. Background technique [0002] Recently, the digital content (Digital Contents) industry based on computer and communication technology is very active. [0003] The so-called digital content refers to all non-material information circulated online such as e-books and multimedia (such as images, music, videos, games, etc.). Due to the nature of digital content itself, it is easy to use the Internet or other data storage devices (such as , CD, floppy disk, flash memory, etc.) copy and disseminate the corresponding data. [0004] Due to the nature of such digital contents, illegal duplication of digital contents has recently been rampant, and in order to prevent this phenomenon, various digital content producers have made various efforts such as introducing a membership system or introducing methods for preventing illegal duplica...

AI Technical Summary

Problems solved by technology

[0016] However, there has been a problem in the past that, from the standpoint of content owners and service providers, performing DRM encryption on all content wastes a lot of resources (time, high performance of encryption equipment, etc.)

[0017] Furthermore, conventionally, there has been a problem that a huge system overhead (overhead) is caused in devices owned by users (for example, mobile phones, PDAs (Personal Digital Assistants), PMPs, PCs (Personal Computers)).

This is because with the improvement of content quality, a large amount of capacity is required, and encoding and decoding require a large amount of system resources

[0018] Especially when the digital copyright management encryption technology is additionally applied, all content needs to be decrypted, and the system overhead of the client system will inevitably increase further

Images