<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><div>Hi~</div><div>My name is James.</div><div>I am a iOS developer.</div><div>My app need sound codec. (1 encoding & 32 decoding at the same time)</div><div>So i used speex codec.</div><div>But codec's performance was lower than my expectation.</div><div>Is it normal ? or did i do something wrong ?</div></div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><br></div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">cpu usage test of speex codec on iPad2. (tested by xcode instruments)</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">================================================================</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">## encoder test</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">a) 1 encoding (VBR, Quality=10, Complexity=2)</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>avg : 26 ~ 28 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>peak: 38 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">b) 1 encoding (VBR, Quality=0, Complexity=1)</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>avg : 14 ~ 16 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>peak: 20 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">c) 1 encoding (VBR, Quality=1, Complexity=10)</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>avg : 14 ~ 22 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>peak: 30 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">d) 1 encoding (VBR, Quality=10, Complexity=10)</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>avg : 26 ~ 76 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>peak: 94 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">e) 1 encoding (CBR, Quality=10, Complexity=2)</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>avg : 30 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>peak: 40 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">f) 1 encoding (CBR, Quality=0, Complexity=1)</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>avg : 14 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>peak: 20 %</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><br></div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><div>## decoder test</div><div>a) 1 decoding (encoding source: VBR, Quality=10, Complexity=2)</div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>avg: 6 ~ 8 %</div><div><br></div><div>b) 10 decodings (encoding sources: VBR, Quality=10, Complexity=2)</div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>avg : 58 ~ 72 %</div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>peak: 82 %</div><div>================================================================</div></div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; "><br></div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">Can you tell me any advice or some information ?</div><div style="font-family: AppleSDGothicNeo-Regular; font-size: 15px; ">Thanks.</div><div><br></div></body></html>