MIDI file decoding method and MIDI file decoding system

Abstract

The invention discloses an MIDI (Musical Instrument Digital Interface) file decoding method and an MIDI file decoding system. The method comprises the following steps of: sequencing MIDI files according to time information parameters of each track of the MIDI files; and decoding the sequenced MIDI files. The system comprises a sequencing module and a decoding module. The MIDI file decoding method and the MIDI file decoding system have the advantages that the obtaining of events of each track in a jumping way is not needed; the pre-decoding of all events of each track is also not needed; decoding resources can be reduced; and the decoding cost of the MIDI files is reduced.

Description

technical field [0001] The invention relates to the technical field of decoding, in particular to a MIDI file decoding method and system. Background technique [0002] The information stored in a MIDI (Musical Instrument Digital Interface) file is an event, not a specific audio content, so a MIDI file often has a relatively high compression ratio and is convenient to use. [0003] In existing MIDI files, for the convenience of recording, each track is independent of each other, and each track can be inserted or deleted only by modifying the track information in the file header. But for a small system, there is not enough Buf (buffer) to cache the events of each track. If the events are not pre-cached, the file needs to jump to get the event and process the event, and the jump to get the event will bring data. Waste of speed. That is, if you do not discard the unused data in the previous track, you need Buf to cache; if you discard the unused data in the previous track, you...

AI Technical Summary

Problems solved by technology

But for a small system, there is not enough Buf (buffer) to cache the events of each track. If the events are not pre-cached, the file needs to jump to get the event and process the event, and the jump to get the event will bring data. waste of speed

That is, if you do not discard the unused data of the previous track, you need Buf to cache; if you discard the unused data of the previous track, you need to re-read after jumping back, wasting the system clock, and according to the compression of MIDI files In comparison, the amount of re-reading of data will be enormous

The above situation will lead to high decoding cost of MIDI files

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