MIDI voice signal playing structure and method and multimedia device for playing same

A playback method and multimedia playback technology, applied to instruments, electro-acoustic musical instruments, etc., can solve problems such as rising costs and low hardware scalability of the playback architecture, and achieve the best hardware flexibility and cost reduction effects

Inactive Publication Date: 2011-03-16
SUNPLUS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the MIDI audio played by the known playback architecture requires a large amount of timbre, a large buffer memory space is required, which not only increases the manufacturing cost, but also causes the hardware scalability of the known MIDI audio playback architecture to be small.

Method used

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  • MIDI voice signal playing structure and method and multimedia device for playing same
  • MIDI voice signal playing structure and method and multimedia device for playing same
  • MIDI voice signal playing structure and method and multimedia device for playing same

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Embodiment Construction

[0030] MIDI data is a definition of a set of music symbols, rather than the actual music sound, so the content of MIDI files is called MIDI audio (MIDI messages). A MIDI message consists of a 1 to 8 bit status byte, usually followed by 2 data bytes. In the status byte, the most significant bit is set to "1", and the next 4 bits can be used to indicate which channel this MIDI audio belongs to, and 4 bits can indicate 16 possible channels. The remaining 3 bits are used to indicate what type of audio this MIDI audio belongs to. MIDI audio can be divided into two categories, namely channel messages (Channel Messages) and system messages (SystemMessages).

[0031]There are many ways to produce MIDI sound effects, and there are two commonly used methods at present: one is the frequency modulation (FM) synthesis method, and the other is the tone waveform (Wavetable) sample synthesis method. Since it is quite difficult to produce a variety of realistic sound effects using frequency ...

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Abstract

This invention relates to MIDI sound play structure, which comprises main control unit, buffer memory, integration unit and pre-process unit, wherein, main control unit receives multiple sound wave sample and one MIDI signal; pre-process unit is coupled to main control unit and buffer memory to analyze MIDI signal and to select partly sound wave sample according to the buffer memory volume size to the buffer memory; integration unit can integrates information into sound signal stored by buffer memory according to MIDI sound.

Description

technical field [0001] The present invention relates to a multimedia playback framework, and in particular to a musical instrument digital interface (MIDI) audio playback framework. Background technique [0002] MIDI is the acronym of Musical Instrument Digital Interface, which can be translated as "electronic musical instrument digital interface". standard protocol. Since the early 1980s, MIDI has gradually been widely accepted and used by musicians and composers. MIDI is a standard language used by musical instruments and computers. It is a set of instructions (that is, a convention of commands) that instructs musical instruments (that is, MIDI devices) what to do and how to do it. For example, such as playing notes, increasing the volume, generating sound effects, etc. MIDI is not a sound signal. What is sent on a MIDI cable is not sound, but an instruction to a MIDI device or other device to make a sound or perform an action. [0003] The reason why the MIDI standard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10H1/00
Inventor 林其昌张芷燕
Owner SUNPLUS TECH CO LTD
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