判断济南音响音质好坏的三要素
2014-10-16 10:27:39 点击：
在济南音响技术中它包含了三方面的内容：声音的音高，即音频的强度和幅度;声音的音调，即音频的频率或每秒变化的次数 ;声音的音色，即音频泛音或谐波成分。谈论某音响的音质好坏，主要是衡量声音的上述三方面是否达到一定的水准，即相对于某一频率或频段的音高是否具有一定的强度，并且在要求的频率范围内 、同一音量下，各频点的幅度是否均匀、均衡、饱满，频率响应曲线是否平直，声音的音准是否准确，既忠实地呈现了音源频率或成分的原来面目，频率的畸变和相移又符合要求 。声音的泛音适中，谐波较丰富，听起来音色就优美动听。
In Ji'nan sound technology it contains three aspects: the pitch of the voice, that is, the intensity and the amplitude frequency; the tone of voice, namely times per second of audio frequency or change; the timbre, audio overtones or harmonics components. Talk about a stereo sound quality is good or bad, is mainly to measure sound above three aspects to a certain level, which is relative to whether a frequency or frequency of the pitch has a certain strength, and in the specified frequency range, the same volume of each frequency point, the amplitude is homogeneous, balanced, full, frequency response curve flat, voice intonation is accurate, is a faithful presents audio frequency or components of the original features, frequency distortion and phase shift and meet the requirements. The voice of the harmonic overtone moderate, rich tone, sounds beautiful.
所谓声音的质量，是指经传输、处理后音频信号的保真度。
The so-called voice quality, refers to the audio signal transmission, treatment fidelity.
目前，业界公认的济南音响声音质量标准分为4级，即数字激光唱盘CD-DA质量，其信号带宽为10Hz~20kHz;调频广播FM质量，其信号带宽为20Hz~15kHz;调幅广播AM质量，其信号带宽为50Hz~7kHz;电话的话音质量，其信号带宽为200Hz~3400Hz。可见，数字激光唱盘的声音质量最高，电话的话音质量最低。除了频率范围外，人们往往还用其它方法和指标来进一步描述不同用途的音质标准。
At present, Ji'nan audio sound quality standard recognized by the industry is divided into 4 levels, namely digital laser discs and CD-DA quality, the signal bandwidth is 10Hz~20kHz; FM broadcasting quality of FM, the signal bandwidth is 20Hz~15kHz; amplitude modulation broadcast quality of AM, the signal bandwidth is 50Hz~7kHz; voice quality of telephone, the signal bandwidth is 200Hz~3400Hz. Visible, the digital CD sound quality the highest, lowest telephone voice quality. In addition to the frequency range, people often use other methods and indicators to further describe the different uses of the quality standard.
对模拟音频来说，再现济南音响 http://www.jnzqyx.com/ 声音的频率成分越多，失真与干扰越小，声音保真度越高，音质也越好。如在通信科学中，声音质量的等级除了用音频信号的频率范围外，还用失真度、信噪比等指标来衡量。 对数字音频来说，再现声音频率的成分越多，误码率越小，音质越好。通常用数码率(或存储容量)来衡量，取样频率越高、量化比特数越大，声道数越多，存储容量越大，当然保真度就高，音质就好。
The analog audio, more frequency components of reproduction of Ji'nan sound sound, sound distortion is smaller and the interference, higher fidelity, sound quality is better. As in the communication science, sound quality level in addition to the use of audio signal frequency range, with distortion, signal to noise ratio and other indicators to measure. The digital audio, composition more reproduction of the sound frequency, error rate is small, the better sound quality. Commonly used digital rate (or storage capacity) to measure, the sampling frequency is higher, the greater the number of quantization bits, channel number, storage capacity is more big, of course, high fidelity sound quality is good.
济南音响声音的类别特点不同，音质要求也不一样。如，语音音质保真度主要体现在清晰、不失真、再现平面声象;乐音的保真度要求较高，营造空间声象主要体现在用多声道模拟立体环绕声，或虚拟双声道3D环绕声等方法，再现原来声源的一切声象。
Category characteristics of Ji'nan the voice sound different, quality requirements are not the same. For example, the fidelity of speech quality is mainly reflected in the clear, without distortion, the reproduction of plane acoustic image; tone fidelity requirements higher, to create space for the sound image is mainly embodied in the simulated stereo surround sound with multi channel, dual channel 3D or virtual surround sound and other methods, the reproduction of the original sound source all sound like.
济南音响音频信号的用途不同，采用压缩的质量标准也不一样。如，电话质量的音频信号采用ITU-TG·711标准，8kHz取样，8bit量化，码率64Kbps。AM广播采用ITU-TG·722标准，16kHz取样，14bit量化，码率224Kbps。高保真立体声音频压缩标准由ISO和ITU-T联合制订，CD11172-3MPEG音频标准为48kHz、44.1kHz、32kHz取样，每声道数码率32Kbps~448Kbps，适合CD-DA光盘用。
Use of Ji'nan sound audio signal compression using different, quality standards are not the same. For example, telephone quality audio signals using the ITU-TG 711 standard, 8kHz sampling, 8bit quantification, 64Kbps rate. AM broadcast by ITU-TG 722 standard, 16kHz sampling, 14bit quantification, 224Kbps rate. High fidelity stereo audio compression standard by ISO and ITU-T jointly developed, CD11172-3MPEG audio standard for 48kHz, 44.1kHz, 32kHz sampling, digital rate per channel 32Kbps~448Kbps, suitable for CD-DA optical disk.
对声音质量要求过高，则设备复杂;反之，则不能满足应用。一般以“够用，又不浪费”为原则。
Ask too much of the sound quality, the device is complex; on the contrary, it cannot satisfy the application. Generally "enough, and not waste" principle.
In Ji'nan sound technology it contains three aspects: the pitch of the voice, that is, the intensity and the amplitude frequency; the tone of voice, namely times per second of audio frequency or change; the timbre, audio overtones or harmonics components. Talk about a stereo sound quality is good or bad, is mainly to measure sound above three aspects to a certain level, which is relative to whether a frequency or frequency of the pitch has a certain strength, and in the specified frequency range, the same volume of each frequency point, the amplitude is homogeneous, balanced, full, frequency response curve flat, voice intonation is accurate, is a faithful presents audio frequency or components of the original features, frequency distortion and phase shift and meet the requirements. The voice of the harmonic overtone moderate, rich tone, sounds beautiful.
所谓声音的质量，是指经传输、处理后音频信号的保真度。
The so-called voice quality, refers to the audio signal transmission, treatment fidelity.
目前，业界公认的济南音响声音质量标准分为4级，即数字激光唱盘CD-DA质量，其信号带宽为10Hz~20kHz;调频广播FM质量，其信号带宽为20Hz~15kHz;调幅广播AM质量，其信号带宽为50Hz~7kHz;电话的话音质量，其信号带宽为200Hz~3400Hz。可见，数字激光唱盘的声音质量最高，电话的话音质量最低。除了频率范围外，人们往往还用其它方法和指标来进一步描述不同用途的音质标准。
At present, Ji'nan audio sound quality standard recognized by the industry is divided into 4 levels, namely digital laser discs and CD-DA quality, the signal bandwidth is 10Hz~20kHz; FM broadcasting quality of FM, the signal bandwidth is 20Hz~15kHz; amplitude modulation broadcast quality of AM, the signal bandwidth is 50Hz~7kHz; voice quality of telephone, the signal bandwidth is 200Hz~3400Hz. Visible, the digital CD sound quality the highest, lowest telephone voice quality. In addition to the frequency range, people often use other methods and indicators to further describe the different uses of the quality standard.
对模拟音频来说，再现济南音响 http://www.jnzqyx.com/ 声音的频率成分越多，失真与干扰越小，声音保真度越高，音质也越好。如在通信科学中，声音质量的等级除了用音频信号的频率范围外，还用失真度、信噪比等指标来衡量。 对数字音频来说，再现声音频率的成分越多，误码率越小，音质越好。通常用数码率(或存储容量)来衡量，取样频率越高、量化比特数越大，声道数越多，存储容量越大，当然保真度就高，音质就好。
The analog audio, more frequency components of reproduction of Ji'nan sound sound, sound distortion is smaller and the interference, higher fidelity, sound quality is better. As in the communication science, sound quality level in addition to the use of audio signal frequency range, with distortion, signal to noise ratio and other indicators to measure. The digital audio, composition more reproduction of the sound frequency, error rate is small, the better sound quality. Commonly used digital rate (or storage capacity) to measure, the sampling frequency is higher, the greater the number of quantization bits, channel number, storage capacity is more big, of course, high fidelity sound quality is good.
济南音响声音的类别特点不同，音质要求也不一样。如，语音音质保真度主要体现在清晰、不失真、再现平面声象;乐音的保真度要求较高，营造空间声象主要体现在用多声道模拟立体环绕声，或虚拟双声道3D环绕声等方法，再现原来声源的一切声象。
Category characteristics of Ji'nan the voice sound different, quality requirements are not the same. For example, the fidelity of speech quality is mainly reflected in the clear, without distortion, the reproduction of plane acoustic image; tone fidelity requirements higher, to create space for the sound image is mainly embodied in the simulated stereo surround sound with multi channel, dual channel 3D or virtual surround sound and other methods, the reproduction of the original sound source all sound like.
济南音响音频信号的用途不同，采用压缩的质量标准也不一样。如，电话质量的音频信号采用ITU-TG·711标准，8kHz取样，8bit量化，码率64Kbps。AM广播采用ITU-TG·722标准，16kHz取样，14bit量化，码率224Kbps。高保真立体声音频压缩标准由ISO和ITU-T联合制订，CD11172-3MPEG音频标准为48kHz、44.1kHz、32kHz取样，每声道数码率32Kbps~448Kbps，适合CD-DA光盘用。
Use of Ji'nan sound audio signal compression using different, quality standards are not the same. For example, telephone quality audio signals using the ITU-TG 711 standard, 8kHz sampling, 8bit quantification, 64Kbps rate. AM broadcast by ITU-TG 722 standard, 16kHz sampling, 14bit quantification, 224Kbps rate. High fidelity stereo audio compression standard by ISO and ITU-T jointly developed, CD11172-3MPEG audio standard for 48kHz, 44.1kHz, 32kHz sampling, digital rate per channel 32Kbps~448Kbps, suitable for CD-DA optical disk.
对声音质量要求过高，则设备复杂;反之，则不能满足应用。一般以“够用，又不浪费”为原则。
Ask too much of the sound quality, the device is complex; on the contrary, it cannot satisfy the application. Generally "enough, and not waste" principle.
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