MCU +DSP structural system digital multimedia coding-decoding method and corresponding system

Abstract

The invention relates to a digital multimedia coding-decoding method used for an MCU plus DSP structure system. The MCU plus DSP structure system comprises an MCU including an OS, an MCU protocol analysis communication module; a memory used for memorizing arithmetic program files; a DSP including a DSP protocol communication module; an interface between the MCU and the DSP; and a communication protocol between the MCU and the DSP. The method includes that: flows are synchronously started and the cooperative flows are analyzed by protocol. The technical proposal of the invention mainly solves three problems: 1. the cooperation between the MCU and the DSP; 2. the completion of the start, the operation and the conversion of arithmetic by using a unified interface and a protocol frame; 3. the completion of arithmetic updating or new arithmetic development by using the unified interface and the protocol frame.

Description

technical field [0001] This patent relates to the application field of digital multimedia coding and decoding, in particular, it relates to a digital multimedia coding and decoding method in an MCU+DSP structure system and a corresponding system. Background technique [0002] When developing mp3 player products or products with media playback functions, you will encounter how the OS (operating system) obtains information such as the bit rate, sampling rate, and total playback time of music files and controls music playback, pause, and fast forward. Realize, and realize the playback operation of files in different formats, and it must be completed in real time. When realizing these functions, the products are usually implemented with MCU+DSP architecture ICs, and usually the OS is placed in the MCU (micro control unit). The more complex calculation processes such as decoding and complex functions need to be completed by DSP (Digital Signal Processor). Therefore, at the same t...

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Problems solved by technology

[0002] When developing mp3 player products or products with media playback functions, you will encounter how the OS (operating system) obtains information such as the bit rate, sampling rate, and total playback time of music files and controls music playback, pause, and fast forward. Realize, and realize the playback operation of files in different formats, and it must be completed in real time. When realizing these functions, the products are usually implemented with MCU+DSP architecture ICs, and usually the OS is placed in the MCU (micro control unit). The more complex calculation processes such as decoding and complex functions need to be completed by DSP (Digital Signal Processor). Therefore, at the same time, the problem of cooperation between MCU and DSP and the problem of algorithm implementation and upgrade have arisen. How to let the OS complete These real-time functions achieve smooth playback, how to give full play to the collaborative computing capabilities of MCU and DSP, and reduce costs, etc.

[0003] At present, digital media players such as mp3 players on the market have many functions, and there are many playback formats that need to be supported, and their functions are constantly increasing. There are also many similar products with media codec functions, but there is no set of real-time , simple and rapid expansion of functions, format-independent interface and protocol framework implementation method, while there are TCP / IP protocol on the network, DLL technology in the operating system, etc., but there is no method and system in this field that can quickly And correctly and completely realize the development of media codec cooperation part

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