Music format conversion method for wireless hand-held device

A handheld device and format conversion technology, which is used in branch equipment, radio/induction link selection and arrangement, electroacoustic musical instruments, etc. It can solve the problems of simple, inability to achieve multi-chord and multi-timbral music effects, and achieve a wide range of application prospects. , the effect of rich expressiveness and small amount of data

Inactive Publication Date: 2004-04-14
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the music information in the iMelody format is too simple to achieve multi-chord and multi-timbre music effects, and MIDI has unique advantages in this regard

Method used

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  • Music format conversion method for wireless hand-held device
  • Music format conversion method for wireless hand-held device
  • Music format conversion method for wireless hand-held device

Examples

Experimental program
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Embodiment Construction

[0031] From figure 1 It can be seen from the flow chart that the present invention aims at realizing MIDI files corresponding to iMelody. The present invention is described in further detail below, and the present embodiment comprises the following steps successively:

[0032] 1. Call the file open function to open an empty binary MIDI file in writable mode;

[0033] 2. Write the MIDI header file information, the header file information includes the identifier "MThd", the size of the header data block is 6, the MIDI file format is 1, the number of tracks is tentatively set to 0 (will be changed later), the corresponding sound of one beat The number of tracks can be customized to 96, and the header file data block occupies a total of 14 bytes;

[0034] 3. Write the header information of an audio track, the header information of the audio track includes the identifier "MTrk", the length of the audio track is tentatively set to 0, and the audio track header data block occupies ...

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Abstract

The method is suitable to wireless handhold type device such as PDA, handset, and PDA handset. Music in simple iMelody format is converted to music in MIDI format rich in tone color. Note in iMelody data source is converted to relevant data in MIDI. Implementing step are as following. Phonic duration is obtained from length and time allocation defined in MIDI file head. Pause is treated singularly. Note code is obtained from musical scale and tone based on MIDI note code table. After music in iMelody format in handhold type device is converted to MIDI format, MIDI player can plays music in rich of multiple chords and multiple tone colors.

Description

technical field [0001] The invention relates to a music format conversion method, in particular to a music format conversion method suitable for wireless handheld devices such as PDAs, mobile phones, and PDA mobile phones. Background technique [0002] Music is an extremely important application in multimedia sound, especially in wireless handheld devices. Mobile phone ringtones are a way for people to entertain and show their individuality. However, the amount of data after digitization of music sounds is very large (such as WAVE and compressed MP3 files), and it is difficult to directly transmit the current limited wireless communication bandwidth and limited internal resources (processor and memory) of wireless handheld devices. , store and play. [0003] EMS (Enhanced Message Service) is an extension to the existing SMS (Short Message Service) standard. Through the SMS standard, people can transmit text information through mobile phones, but through the EMS standard, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10H1/00H04L29/06H04M1/72442H04M11/00
Inventor 高成伟邹迈王斌锋黄立新胡胜发
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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