请问.wav格式音频文件使用的是A律PCM还是u律PCM? .wav文件有文件头,在文件头里面有个字段指示编码格式。到win32的帮助文件看看WAVEFORMATEX结构就知道了。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 您能不能再讲详细点,那个字段是不是FarmatTag?如果是,那么它的哪个值对应A律,哪个值对应u律 打开头文件mmreg.h、mmsystem.h,里面有定义:#define WAVE_FORMAT_ALAW 0x0006 /* Microsoft Corporation */#define WAVE_FORMAT_MULAW 0x0007 /* Microsoft Corporation */ 我查了下,头文件里定义wav文件的文件头中Format Chunk中的FormatTag字段如下0x0001 pcm0x0006 A 律PCM0x0007 u 律PCM那么0x0001到底是A律还是u律呢?附定义:defined wformattags expr1 wave form registration no - hex expr2 #define wave_format_g723_adpcm 0x0014 /* antex electronics corporation */ #define wave_format_antex_adpcme 0x0033 /* antex electronics corporation */ #define wave_format_g721_adpcm 0x0040 /* antex electronics corporation */ #define wave_format_aptx 0x0025 /* audio processing technology */ #define wave_format_audiofile_af36 0x0024 /* audiofile, inc. */ #define wave_format_audiofile_af10 0x0026 /* audiofile, inc. */ #define wave_format_control_res_vqlpc 0x0034 /* control resources limited */ #define wave_format_control_res_cr10 0x0037 /* control resources limited */ #define wave_format_creative_adpcm 0x0200 /* creative labs, inc */ #define wave_format_dolby_ac2 0x0030 /* dolby laboratories */ #define wave_format_dspgroup_truespeech 0x0022 /* dsp group, inc */ #define wave_format_digistd 0x0015 /* dsp solutions, inc. */ #define wave_format_digifix 0x0016 /* dsp solutions, inc. */ #define wave_format_digireal 0x0035 /* dsp solutions, inc. */ #define wave_format_digiadpcm 0x0036 /* dsp solutions, inc. */ #define wave_format_echosc1 0x0023 /* echo speech corporation */ #define wave_format_fm_towns_snd 0x0300 /* fujitsu corp. */ #define wave_format_ibm_cvsd 0x0005 /* ibm corporation */ #define wave_format_oligsm 0x1000 /* ing c. olivetti & c., s.p.a. */ #define wave_format_oliadpcm 0x1001 /* ing c. olivetti & c., s.p.a. */ #define wave_format_olicelp 0x1002 /* ing c. olivetti & c., s.p.a. */ #define wave_format_olisbc 0x1003 /* ing c. olivetti & c., s.p.a. */ #define wave_format_oliopr 0x1004 /* ing c. olivetti & c., s.p.a. */ #define wave_format_ima_adpcm (wave_form_dvi_adpcm) /* intel corporation */ #define wave_format_dvi_adpcm 0x0011 /* intel corporation */ #define wave_format_unknown 0x0000 /* microsoft corporation */ #define wave_format_pcm 0x0001 /* microsoft corporation */ #define wave_format_adpcm 0x0002 /* microsoft corporation */ #define wave_format_alaw 0x0006 /* microsoft corporation */ #define wave_format_mulaw 0x0007 /* microsoft corporation */ #define wave_format_gsm610 0x0031 /* microsoft corporation */ #define wave_format_mpeg 0x0050 /* microsoft corporation */ #define wave_format_nms_vbxadpcm 0x0038 /* natural microsystems */ #define wave_format_oki_adpcm 0x0010 /* oki */ #define wave_format_sierra_adpcm 0x0013 /* sierra semiconductor corp */ #define wave_format_sonarc 0x0021 /* speech compression */ #define wave_format_mediaspace_adpcm 0x0012 /* videologic */ #define wave_format_yamaha_adpcm 0x0020 /* yamaha corporation of america */ 1的线性PCM格式嘛,6是A率,7是U率,不是都很清楚了吗。 我的理解.一般的都是pcm的格式。 pcm是原始数据原封不动地量化编码(这种量化的位宽大),A律pcm是经过压扩后的非均匀量化(小信号细量化大信号粗量化),U律pcm是经过压扩后的均匀量化(A/U律量化的位宽小)。 nmake能实现对头文件的增量编译吗? 100分寻找一个浮动效果ui库 我有份汇编的试卷,大家能帮我写一下正确答案吗? 关于画图 简单问题,急,高分求解 如何建立一个文件夹 寻找win32编写的tooltip示例程序,不是MFC的 高手请进,我这样的水平应该如何发展? 求源程序! 请教_cdecl关键字 在MFC中如何使用水晶报表? CreateThread参数的问题!
#define WAVE_FORMAT_ALAW 0x0006 /* Microsoft Corporation */
#define WAVE_FORMAT_MULAW 0x0007 /* Microsoft Corporation */
0x0001 pcm
0x0006 A 律PCM
0x0007 u 律PCM那么0x0001到底是A律还是u律呢?附定义:
defined wformattags
expr1 wave form registration no - hex expr2
#define wave_format_g723_adpcm 0x0014 /* antex electronics corporation */
#define wave_format_antex_adpcme 0x0033 /* antex electronics corporation */
#define wave_format_g721_adpcm 0x0040 /* antex electronics corporation */
#define wave_format_aptx 0x0025 /* audio processing technology */
#define wave_format_audiofile_af36 0x0024 /* audiofile, inc. */
#define wave_format_audiofile_af10 0x0026 /* audiofile, inc. */
#define wave_format_control_res_vqlpc 0x0034 /* control resources limited */
#define wave_format_control_res_cr10 0x0037 /* control resources limited */
#define wave_format_creative_adpcm 0x0200 /* creative labs, inc */
#define wave_format_dolby_ac2 0x0030 /* dolby laboratories */
#define wave_format_dspgroup_truespeech 0x0022 /* dsp group, inc */
#define wave_format_digistd 0x0015 /* dsp solutions, inc. */
#define wave_format_digifix 0x0016 /* dsp solutions, inc. */
#define wave_format_digireal 0x0035 /* dsp solutions, inc. */
#define wave_format_digiadpcm 0x0036 /* dsp solutions, inc. */
#define wave_format_echosc1 0x0023 /* echo speech corporation */
#define wave_format_fm_towns_snd 0x0300 /* fujitsu corp. */
#define wave_format_ibm_cvsd 0x0005 /* ibm corporation */
#define wave_format_oligsm 0x1000 /* ing c. olivetti & c., s.p.a. */
#define wave_format_oliadpcm 0x1001 /* ing c. olivetti & c., s.p.a. */
#define wave_format_olicelp 0x1002 /* ing c. olivetti & c., s.p.a. */
#define wave_format_olisbc 0x1003 /* ing c. olivetti & c., s.p.a. */
#define wave_format_oliopr 0x1004 /* ing c. olivetti & c., s.p.a. */
#define wave_format_ima_adpcm (wave_form_dvi_adpcm) /* intel corporation */
#define wave_format_dvi_adpcm 0x0011 /* intel corporation */
#define wave_format_unknown 0x0000 /* microsoft corporation */
#define wave_format_pcm 0x0001 /* microsoft corporation */
#define wave_format_adpcm 0x0002 /* microsoft corporation */
#define wave_format_alaw 0x0006 /* microsoft corporation */
#define wave_format_mulaw 0x0007 /* microsoft corporation */
#define wave_format_gsm610 0x0031 /* microsoft corporation */
#define wave_format_mpeg 0x0050 /* microsoft corporation */
#define wave_format_nms_vbxadpcm 0x0038 /* natural microsystems */
#define wave_format_oki_adpcm 0x0010 /* oki */
#define wave_format_sierra_adpcm 0x0013 /* sierra semiconductor corp */
#define wave_format_sonarc 0x0021 /* speech compression */
#define wave_format_mediaspace_adpcm 0x0012 /* videologic */
#define wave_format_yamaha_adpcm 0x0020 /* yamaha corporation of america */