发明名称 |
CONVERSION FROM NOTE-BASED AUDIO FORMAT TO PCM-BASED AUDIO FORMAT |
摘要 |
A system and method for converting a note-based audio object to a Pulse Code Modulated (PCM) audio format is disclosed. An electronic communication device includes a memory containing a note-based audio object and lookup table containing trigonometric function evaluations. The note-based audio object contains note frequency information. The note--based audio object is converted to a PCM stream by generating PCM code words for each sample point in the PCM stream based upon the note frequency information. The PCM code words are determined based upon selection of one or more of the trigonometric function evaluations within the look-up table. A speaker outputs audio based upon the PCM formatted stream.
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申请公布号 |
CA2568117(C) |
申请公布日期 |
2012.09.18 |
申请号 |
CA20062568117 |
申请日期 |
2006.11.14 |
申请人 |
RESEARCH IN MOTION LIMITED |
发明人 |
BYLSMA, RODNEY |
分类号 |
G10K15/04;G10H5/00;G10H7/00 |
主分类号 |
G10K15/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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