Conversion from note-based audio format to PCM-based audio format
A system and method for converting a note-based audio object to a Pulse Code Modulated (PCM) audio format is disclosed. An electronic computer device includes a memory containing a note-based audio object and a lookup table, the note-based audio object containing note frequency information. A proces...
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| creator | Bylsma, Rodney |
| description | A system and method for converting a note-based audio object to a Pulse Code Modulated (PCM) audio format is disclosed. An electronic computer device includes a memory containing a note-based audio object and a lookup table, the note-based audio object containing note frequency information. A processor is configured for converting the note-based audio object to a Pulse Code Modulated (PCM) stream having a plurality of sample points, the converting including: generating a PCM value for each sample point based upon the note frequency and the trigonometric function evaluations, selecting an entry from the look-up table based upon the note frequency information, a sampling frequency, and a sample point number, and determining a step size within the look-up table based upon a ratio between the note frequency information and the sampling frequency. |
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| fullrecord | <record><control><sourceid>uspatents_EFH</sourceid><recordid>TN_cdi_uspatents_grants_08175525</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>08175525</sourcerecordid><originalsourceid>FETCH-uspatents_grants_081755253</originalsourceid><addsrcrecordid>eNrjZHB0zs8rSy0qzszPU0grys9VyMsvSdVNSixOTVFILE3JzFdIyy_KTSxRKMlXCHD2xSLDw8CalphTnMoLpbkZFNxcQ5w9dEuLCxJLUvNKiuPTixJBlIGFobmpqZGpMRFKAJApMfk</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Conversion from note-based audio format to PCM-based audio format</title><source>USPTO Issued Patents</source><creator>Bylsma, Rodney</creator><creatorcontrib>Bylsma, Rodney ; Research In Motion Limited</creatorcontrib><description>A system and method for converting a note-based audio object to a Pulse Code Modulated (PCM) audio format is disclosed. An electronic computer device includes a memory containing a note-based audio object and a lookup table, the note-based audio object containing note frequency information. A processor is configured for converting the note-based audio object to a Pulse Code Modulated (PCM) stream having a plurality of sample points, the converting including: generating a PCM value for each sample point based upon the note frequency and the trigonometric function evaluations, selecting an entry from the look-up table based upon the note frequency information, a sampling frequency, and a sample point number, and determining a step size within the look-up table based upon a ratio between the note frequency information and the sampling frequency.</description><language>eng</language><creationdate>2012</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8175525$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,780,802,885,64037</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8175525$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Bylsma, Rodney</creatorcontrib><creatorcontrib>Research In Motion Limited</creatorcontrib><title>Conversion from note-based audio format to PCM-based audio format</title><description>A system and method for converting a note-based audio object to a Pulse Code Modulated (PCM) audio format is disclosed. An electronic computer device includes a memory containing a note-based audio object and a lookup table, the note-based audio object containing note frequency information. A processor is configured for converting the note-based audio object to a Pulse Code Modulated (PCM) stream having a plurality of sample points, the converting including: generating a PCM value for each sample point based upon the note frequency and the trigonometric function evaluations, selecting an entry from the look-up table based upon the note frequency information, a sampling frequency, and a sample point number, and determining a step size within the look-up table based upon a ratio between the note frequency information and the sampling frequency.</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2012</creationdate><recordtype>patent</recordtype><sourceid>EFH</sourceid><recordid>eNrjZHB0zs8rSy0qzszPU0grys9VyMsvSdVNSixOTVFILE3JzFdIyy_KTSxRKMlXCHD2xSLDw8CalphTnMoLpbkZFNxcQ5w9dEuLCxJLUvNKiuPTixJBlIGFobmpqZGpMRFKAJApMfk</recordid><startdate>20120508</startdate><enddate>20120508</enddate><creator>Bylsma, Rodney</creator><scope>EFH</scope></search><sort><creationdate>20120508</creationdate><title>Conversion from note-based audio format to PCM-based audio format</title><author>Bylsma, Rodney</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-uspatents_grants_081755253</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2012</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Bylsma, Rodney</creatorcontrib><creatorcontrib>Research In Motion Limited</creatorcontrib><collection>USPTO Issued Patents</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Bylsma, Rodney</au><aucorp>Research In Motion Limited</aucorp><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Conversion from note-based audio format to PCM-based audio format</title><date>2012-05-08</date><risdate>2012</risdate><abstract>A system and method for converting a note-based audio object to a Pulse Code Modulated (PCM) audio format is disclosed. An electronic computer device includes a memory containing a note-based audio object and a lookup table, the note-based audio object containing note frequency information. A processor is configured for converting the note-based audio object to a Pulse Code Modulated (PCM) stream having a plurality of sample points, the converting including: generating a PCM value for each sample point based upon the note frequency and the trigonometric function evaluations, selecting an entry from the look-up table based upon the note frequency information, a sampling frequency, and a sample point number, and determining a step size within the look-up table based upon a ratio between the note frequency information and the sampling frequency.</abstract><oa>free_for_read</oa></addata></record> |
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| title | Conversion from note-based audio format to PCM-based audio format |
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