公司最近开发的一个微信语音红包，就是前些时间比较火的包你说红包小程序。如何提高识别的精准度呢。
在说精准度之前，先大概说下整个语音识别的开发流程。前面我有文章已经说到过了。具体我就不谈了。一笔带过。
先是通过小程序前端调动语音录制功能拿到客户说的语音，比如mp3格式，然后通过百度的语音识别算法，转为文字。具体看百度语音识别的接口。地址http://yuyin.baidu.com/docs/asr/188
返回的格式如下：
// 成功返回{"err_no": 0,"err_msg": "success.","corpus_no": "15984125203285346378","sn": "481D633F-73BA-726F-49EF-8659ACCC2F3D","result": ["北京天气"]}
json格式的，取到他的文字来，然后和你的语音红包文字进行匹配，匹配对了，就可以抢到这个语音红包了。
好了，问题来了，如果只用中文进行匹配，就会出现，比如我们说话的时候，我们打一个字，比如lianhe 会出现很多个词组，比如联合 连和 联和 莲河 那么具体是哪个呢？
我们之前开发的第一个版本，我们就遇到这个坑了，当时一个客户是要连和，但是呢，百度识别一直给你识别的是联合。这就让人抓狂了。客户一直抢不到红包。但是我说是说对了呀。那怎么办呢？产品经理将问题提过来了。技术员，看看你怎么解决了？
嗯，临危受命，我们想想技术怎么来解决吧。于是想到的方法就是两种：
1、将文字转为拼音，匹配这两个的拼音是否一致。
2、拼音可能会遇到南方人和北方人的区别，比如是否有后鼻音的问题。 beijing 和beijin 没有后鼻音的。那么就将拼音作为一个单元，比如一个词组，假设有10个字母，我们设置概率，只要80%的准确率就算答对了。
使用上面这两个方法成功将这个问题解决了。所以重点就是文字怎么转为拼音了。大家可以去百度搜有相关的类库函数，直接调用就可以了。
我这里也分享一个我自己在用的。大家需要可以直接复制使用。还不错哦。也是我百度搜的，别人写的一个类库。
1 /** 2 *+------------------------------------------------------ 3 * php 汉字转拼音 4 *+------------------------------------------------------ 5 * 使用方法: 6 * $py = new PinYin(); 7 * echo $py->getAllPY("输出汉字所有拼音"); //shuchuhanzisuoyoupinyin 8 * echo $py->getFirstPY("输出汉字首拼音"); //schzspy 9 *+------------------------------------------------------ 10 */ 11 class PinYin { 12 private $pylist = array( 13 ‘a‘=>-20319,‘ai‘=>-20317,‘an‘=>-20304,‘ang‘=>-20295,‘ao‘=>-20292, 14 ‘ba‘=>-20283,‘bai‘=>-20265,‘ban‘=>-20257,‘bang‘=>-20242,‘bao‘=>-20230,‘bei‘=>-20051,‘ben‘=>-20036,‘beng‘=>-20032,‘bi‘=>-20026,‘bian‘=>-20002,‘biao‘=>-19990,‘bie‘=>-19986,‘bin‘=>-19982,‘bing‘=>-19976,‘bo‘=>-19805,‘bu‘=>-19784, 15 ‘ca‘=>-19775,‘cai‘=>-19774,‘can‘=>-19763,‘cang‘=>-19756,‘cao‘=>-19751,‘ce‘=>-19746,‘ceng‘=>-19741,‘cha‘=>-19739,‘chai‘=>-19728,‘chan‘=>-19725,‘chang‘=>-19715,‘chao‘=>-19540,‘che‘=>-19531,‘chen‘=>-19525,‘cheng‘=>-19515,‘chi‘=>-19500,‘chong‘=>-19484,‘chou‘=>-19479,‘chu‘=>-19467,‘chuai‘=>-19289,‘chuan‘=>-19288,‘chuang‘=>-19281,‘chui‘=>-19275,‘chun‘=>-19270,‘chuo‘=>-19263,‘ci‘=>-19261,‘cong‘=>-19249,‘cou‘=>-19243,‘cu‘=>-19242,‘cuan‘=>-19238,‘cui‘=>-19235,‘cun‘=>-19227,‘cuo‘=>-19224, 16 ‘da‘=>-19218,‘dai‘=>-19212,‘dan‘=>-19038,‘dang‘=>-19023,‘dao‘=>-19018,‘de‘=>-19006,‘deng‘=>-19003,‘di‘=>-18996,‘dian‘=>-18977,‘diao‘=>-18961,‘die‘=>-18952,‘ding‘=>-18783,‘diu‘=>-18774,‘dong‘=>-18773,‘dou‘=>-18763,‘du‘=>-18756,‘duan‘=>-18741,‘dui‘=>-18735,‘dun‘=>-18731,‘duo‘=>-18722, 17 ‘e‘=>-18710,‘en‘=>-18697,‘er‘=>-18696, 18 ‘fa‘=>-18526,‘fan‘=>-18518,‘fang‘=>-18501,‘fei‘=>-18490,‘fen‘=>-18478,‘feng‘=>-18463,‘fo‘=>-18448,‘fou‘=>-18447,‘fu‘=>-18446, 19 ‘ga‘=>-18239,‘gai‘=>-18237,‘gan‘=>-18231,‘gang‘=>-18220,‘gao‘=>-18211,‘ge‘=>-18201,‘gei‘=>-18184,‘gen‘=>-18183,‘geng‘=>-18181,‘gong‘=>-18012,‘gou‘=>-17997,‘gu‘=>-17988,‘gua‘=>-17970,‘guai‘=>-17964,‘guan‘=>-17961,‘guang‘=>-17950,‘gui‘=>-17947, 20 ‘gun‘=>-17931,‘guo‘=>-17928, 21 ‘ha‘=>-17922,‘hai‘=>-17759,‘han‘=>-17752,‘hang‘=>-17733,‘hao‘=>-17730,‘he‘=>-17721,‘hei‘=>-17703,‘hen‘=>-17701,‘heng‘=>-17697,‘hong‘=>-17692,‘hou‘=>-17683,‘hu‘=>-17676,‘hua‘=>-17496,‘huai‘=>-17487,‘huan‘=>-17482,‘huang‘=>-17468,‘hui‘=>-17454, 22 ‘hun‘=>-17433,‘huo‘=>-17427, 23 ‘ji‘=>-17417,‘jia‘=>-17202,‘jian‘=>-17185,‘jiang‘=>-16983,‘jiao‘=>-16970,‘jie‘=>-16942,‘jin‘=>-16915,‘jing‘=>-16733,‘jiong‘=>-16708,‘jiu‘=>-16706,‘ju‘=>-16689,‘juan‘=>-16664,‘jue‘=>-16657,‘jun‘=>-16647, 24 ‘ka‘=>-16474,‘kai‘=>-16470,‘kan‘=>-16465,‘kang‘=>-16459,‘kao‘=>-16452,‘ke‘=>-16448,‘ken‘=>-16433,‘keng‘=>-16429,‘kong‘=>-16427,‘kou‘=>-16423,‘ku‘=>-16419,‘kua‘=>-16412,‘kuai‘=>-16407,‘kuan‘=>-16403,‘kuang‘=>-16401,‘kui‘=>-16393,‘kun‘=>-16220,‘kuo‘=>-16216, 25 ‘la‘=>-16212,‘lai‘=>-16205,‘lan‘=>-16202,‘lang‘=>-16187,‘lao‘=>-16180,‘le‘=>-16171,‘lei‘=>-16169,‘leng‘=>-16158,‘li‘=>-16155,‘lia‘=>-15959,‘lian‘=>-15958,‘liang‘=>-15944,‘liao‘=>-15933,‘lie‘=>-15920,‘lin‘=>-15915,‘ling‘=>-15903,‘liu‘=>-15889, 26 ‘long‘=>-15878,‘lou‘=>-15707,‘lu‘=>-15701,‘lv‘=>-15681,‘luan‘=>-15667,‘lue‘=>-15661,‘lun‘=>-15659,‘luo‘=>-15652, 27 ‘ma‘=>-15640,‘mai‘=>-15631,‘man‘=>-15625,‘mang‘=>-15454,‘mao‘=>-15448,‘me‘=>-15436,‘mei‘=>-15435,‘men‘=>-15419,‘meng‘=>-15416,‘mi‘=>-15408,‘mian‘=>-15394,‘miao‘=>-15385,‘mie‘=>-15377,‘min‘=>-15375,‘ming‘=>-15369,‘miu‘=>-15363,‘mo‘=>-15362,‘mou‘=>-15183,‘mu‘=>-15180, 28 ‘na‘=>-15165,‘nai‘=>-15158,‘nan‘=>-15153,‘nang‘=>-15150,‘nao‘=>-15149,‘ne‘=>-15144,‘nei‘=>-15143,‘nen‘=>-15141,‘neng‘=>-15140,‘ni‘=>-15139,‘nian‘=>-15128,‘niang‘=>-15121,‘niao‘=>-15119,‘nie‘=>-15117,‘nin‘=>-15110,‘ning‘=>-15109,‘niu‘=>-14941, 29 ‘nong‘=>-14937,‘nu‘=>-14933,‘nv‘=>-14930,‘nuan‘=>-14929,‘nue‘=>-14928,‘nuo‘=>-14926, 30 ‘o‘=>-14922,‘ou‘=>-14921, 31 ‘pa‘=>-14914,‘pai‘=>-14908,‘pan‘=>-14902,‘pang‘=>-14894,‘pao‘=>-14889,‘pei‘=>-14882,‘pen‘=>-14873,‘peng‘=>-14871,‘pi‘=>-14857,‘pian‘=>-14678,‘piao‘=>-14674,‘pie‘=>-14670,‘pin‘=>-14668,‘ping‘=>-14663,‘po‘=>-14654,‘pu‘=>-14645, 32 ‘qi‘=>-14630,‘qia‘=>-14594,‘qian‘=>-14429,‘qiang‘=>-14407,‘qiao‘=>-14399,‘qie‘=>-14384,‘qin‘=>-14379,‘qing‘=>-14368,‘qiong‘=>-14355,‘qiu‘=>-14353,‘qu‘=>-14345,‘quan‘=>-14170,‘que‘=>-14159,‘qun‘=>-14151, 33 ‘ran‘=>-14149,‘rang‘=>-14145,‘rao‘=>-14140,‘re‘=>-14137,‘ren‘=>-14135,‘reng‘=>-14125,‘ri‘=>-14123,‘rong‘=>-14122,‘rou‘=>-14112,‘ru‘=>-14109,‘ruan‘=>-14099,‘rui‘=>-14097,‘run‘=>-14094,‘ruo‘=>-14092, 34 ‘sa‘=>-14090,‘sai‘=>-14087,‘san‘=>-14083,‘sang‘=>-13917,‘sao‘=>-13914,‘se‘=>-13910,‘sen‘=>-13907,‘seng‘=>-13906,‘sha‘=>-13905,‘shai‘=>-13896,‘shan‘=>-13894,‘shang‘=>-13878,‘shao‘=>-13870,‘she‘=>-13859,‘shen‘=>-13847,‘sheng‘=>-13831,‘shi‘=>-13658,‘shou‘=>-13611,‘shu‘=>-13601,‘shua‘=>-13406,‘shuai‘=>-13404,‘shuan‘=>-13400,‘shuang‘=>-13398,‘shui‘=>-13395,‘shun‘=>-13391,‘shuo‘=>-13387,‘si‘=>-13383,‘song‘=>-13367,‘sou‘=>-13359,‘su‘=>-13356,‘suan‘=>-13343,‘sui‘=>-13340,‘sun‘=>-13329,‘suo‘=>-13326, 35 ‘ta‘=>-13318,‘tai‘=>-13147,‘tan‘=>-13138,‘tang‘=>-13120,‘tao‘=>-13107,‘te‘=>-13096,‘teng‘=>-13095,‘ti‘=>-13091,‘tian‘=>-13076,‘tiao‘=>-13068,‘tie‘=>-13063,‘ting‘=>-13060,‘tong‘=>-12888,‘tou‘=>-12875,‘tu‘=>-12871,‘tuan‘=>-12860,‘tui‘=>-12858,‘tun‘=>-12852,‘tuo‘=>-12849, 36 ‘wa‘=>-12838,‘wai‘=>-12831,‘wan‘=>-12829,‘wang‘=>-12812,‘wei‘=>-12802,‘wen‘=>-12607,‘weng‘=>-12597,‘wo‘=>-12594,‘wu‘=>-12585, 37 ‘xi‘=>-12556,‘xia‘=>-12359,‘xian‘=>-12346,‘xiang‘=>-12320,‘xiao‘=>-12300,‘xie‘=>-12120,‘xin‘=>-12099,‘xing‘=>-12089,‘xiong‘=>-12074,‘xiu‘=>-12067,‘xu‘=>-12058,‘xuan‘=>-12039,‘xue‘=>-11867,‘xun‘=>-11861, 38 ‘ya‘=>-11847,‘yan‘=>-11831,‘yang‘=>-11798,‘yao‘=>-11781,‘ye‘=>-11604,‘yi‘=>-11589,‘yin‘=>-11536,‘ying‘=>-11358,‘yo‘=>-11340,‘yong‘=>-11339,‘you‘=>-11324,‘yu‘=>-11303,‘yuan‘=>-11097,‘yue‘=>-11077,‘yun‘=>-11067, 39 ‘za‘=>-11055,‘zai‘=>-11052,‘zan‘=>-11045,‘zang‘=>-11041,‘zao‘=>-11038,‘ze‘=>-11024,‘zei‘=>-11020,‘zen‘=>-11019,‘zeng‘=>-11018,‘zha‘=>-11014,‘zhai‘=>-10838,‘zhan‘=>-10832,‘zhang‘=>-10815,‘zhao‘=>-10800,‘zhe‘=>-10790,‘zhen‘=>-10780,‘zheng‘=>-10764,‘zhi‘=>-10587,‘zhong‘=>-10544,‘zhou‘=>-10533,‘zhu‘=>-10519,‘zhua‘=>-10331,‘zhuai‘=>-10329,‘zhuan‘=>-10328,‘zhuang‘=>-10322,‘zhui‘=>-10315,‘zhun‘=>-10309,‘zhuo‘=>-10307,‘zi‘=>-10296,‘zong‘=>-10281,‘zou‘=>-10274,‘zu‘=>-10270,‘zuan‘=>-10262, 40 ‘zui‘=>-10260,‘zun‘=>-10256,‘zuo‘=>-10254 41 ); 42 43 44 /** 45 *+--------------------------------------------------------------------------------- 46 * 获取全部拼音 47 *+--------------------------------------------------------------------------------- 48 * @return string 49 *+--------------------------------------------------------------------------------- 50 */ 51 public function getAllPY($chinese, $delimiter = ‘‘, $length = 0,$charset=‘utf-8‘) { 52 if($charset != ‘gb2312‘) $chinese = $this->_U2_Utf8_Gb($chinese); 53 $py = $this->zh_to_pys($chinese, $delimiter); 54 if($length) { 55 $py = substr($py, 0, $length); 56 } 57 return $py; 58 } 59 60 /** 61 *+-------------------------------------------------------------------------------- 62 * 获取拼音首字母 63 *+-------------------------------------------------------------------------------- 64 * @return string 65 *+-------------------------------------------------------------------------------- 66 */ 67 public function getFirstPY($chinese,$charset=‘utf-8‘){ 68 if($charset != ‘gb2312‘) $chinese = $this->_U2_Utf8_Gb($chinese); 69 $result = ‘‘ ; 70 for ($i=0; $i<strlen($chinese); $i++) { 71 $p = ord(substr($chinese,$i,1)); 72 if ($p>160) { 73 $q = ord(substr($chinese,++$i,1)); 74 $p = $p*256 + $q - 65536; 75 } 76 $result .= substr($this->zh_to_py($p),0,1); 77 } 78 return $result ; 79 } 80 81 public function _U2_Utf8_Gb($_C){ 82 $_String = ‘‘; 83 if($_C < 0x80) $_String .= $_C; 84 elseif($_C < 0x800) 85 { 86 $_String .= chr(0xC0 | $_C>>6); 87 $_String .= chr(0x80 | $_C & 0x3F); 88 }elseif($_C < 0x10000){ 89 $_String .= chr(0xE0 | $_C>>12); 90 $_String .= chr(0x80 | $_C>>6 & 0x3F); 91 $_String .= chr(0x80 | $_C & 0x3F); 92 } elseif($_C < 0x200000) { 93 $_String .= chr(0xF0 | $_C>>18); 94 $_String .= chr(0x80 | $_C>>12 & 0x3F); 95 $_String .= chr(0x80 | $_C>>6 & 0x3F); 96 $_String .= chr(0x80 | $_C & 0x3F); 97 } 98 return iconv(‘UTF-8‘, ‘GB2312‘, $_String); 99 } 100 101 private function zh_to_py($num, $blank = ‘‘) { 102 if($num>0 && $num<160 ) { 103 return chr($num); 104 } elseif ($num<-20319||$num>-10247) { 105 return $blank; 106 } else { 107 foreach ($this->pylist as $py => $code) { 108 if($code > $num) break; 109 $result = $py; 110 } 111 return $result; 112 } 113 } 114 115 private function zh_to_pys($chinese, $delimiter = ‘ ‘, $first=0){ 116 $result = array(); 117 for($i=0; $i<strlen($chinese); $i++) { 118 $p = ord(substr($chinese,$i,1)); 119 if($p>160) { 120 $q = ord(substr($chinese,++$i,1)); 121 $p = $p*256 + $q - 65536; 122 } 123 $result[] = $this->zh_to_py($p); 124 if ($first) { 125 return $result[0]; 126 } 127 } 128 return implode($delimiter, $result); 129 } 130 }
好了，今天就给大家分享到这里了。我，秋峰，phper，目前自创业，做项目系统开发，php后端加小程序前端结合 欢迎交流 大家相互学习 共同提高 我的 微信号：qiufeng2983