Scrambled/descrambled-data-scattering-based video scrambling system

Abstract

The invention discloses a scrambled/descrambled-data-scattering-based video scrambling system. The system inputs a scrambled transport stream (TS) code stream meeting a moving picture experts group (MPEG) standard, outputs a scrambled/descrambled-data-scattering-processing-based scrambled TS code stream meeting the MPEG standard, and comprises a conditional access (CA) descrambler, a scrambled/descrambled stream synchronous processing module, a first MPEG system layer de-multiplexing module, a second MPEG system layer de-multiplexing module, a video data transcoding processing module, an audio data transcoding processing module and a scrambled/descrambled-data-packet-scattering-based MPEG system layer de-multiplexing module. The system can finish the secondary processing of a descrambled code stream without constructing a conditional access system (CAS) again, solves problems in the application of multimedia systems such as digital television systems and the like, reduces system cost,and improves the international primacy of China in the technical field; and audio/video data processed by the system meets different coding standards, wherein the standards for videos at least comprise MPEG-2, MPEG-4, H.264/advanced video coding (AVC), H.264 scalable video coding (SVC), H.264 multi-view video coding (MVC) and an audio video standard (AVS); and the standards for audios at least comprise MPEG-2, advanced audio coding (AAC), doblyAC-3 and the like.

Description

technical field [0001] The invention relates to the technical field of digital multimedia video encoding, in particular to an encryption method for digital video code streams. Background technique [0002] Digital multimedia technology is developing rapidly, and digital TV, network streaming media and mobile multimedia services will provide people with rich audio and video services in the near future. In order to protect the production copyright of program producers, when providing multimedia services to end users, scrambling processing is usually performed on program content, that is, scrambling (encryption) processing is performed on multimedia code streams. After the scrambling process, the terminal user can normally receive the program only after paying the corresponding fee to the program provider. Otherwise, end users cannot watch programs. [0003] At present, the scrambling technology of the multimedia code stream has been widely used in the digital TV system, and ...

AI Technical Summary

Problems solved by technology

Due to the complexity and high cost of building a CAS system, re-s

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