Welcome to the official website of Mingyin Technology!

18002202135

English
  • 繁体中文
  • 中文
  • English

What is sampling rate and quantization precision

Click: Time:2021-12-22 16:28:53

Sampling frequency: ordinary CD is 44.1KHz sampling rate, DVD is 48KHz sampling rate, 48KHz sampling rate is slightly higher than 44.1KHz sampling rate, there will be no significant difference in subjective listening. How clear would a 44.1KHz sample rate be? It is related to the auditory characteristics. The human ear can hear the highest frequency of 20KHz, and the subjective sense of hearing begins to have a clear feeling above 11KHz. To clarify the Nyquist theorem, two fixed sampling points can represent the highest fixed waveform sampling frequency, but cannot represent an unfixed waveform. There is a misunderstanding that the so-called 44.1KHz sampling rate can restore the 22KHz audio frequency. A waveform that does not change constantly needs n sampling points to restore. The more sampling points, the smaller the waveform distortion. After the sampling rate, waveform distortion and quantization accuracy are determined, the restored waveform frequency can be determined. When the sampling rate is 44.1KHz and the quantization accuracy is 16bit, the subjective sense of hearing is a little clear, but it is stiff and digital, and the waveform is restored at 6KHz-11KHz, which is CD quality. The 48KHz sampling restoration only slightly improves the point definition, and the highest waveform restoration is lower than 12KHz, which is still stiff and digital. 88.2KHz, 96KHz, 192KHz sampling and restoration clarity gradually improved.

Dynamic range: When the quantization precision is 16bit, the corresponding decimal number is 0 to 65535, and the difference is 1/65535. The dynamic range of the quantized analog quantity can be 65535 different, which is 96.32 decibels. The pain-free limit sound pressure of the human ear is 90 decibels, and the dynamic range of 96 decibels is sufficient for ordinary applications, but higher dynamic range reserves are required to play explosions and symphonies at the cinema or home theater level.


文章推荐

 Contact Us

Technical support: 18002202135 Sun Gong/18002202159 Yao Gong

Mr. Sun 18002202135                          

Contact email: sunzhiguo@mykjaudio.com

Mr. Yu 18054225237                         

Contact Email: infs-marketingdirector@mykjaudio.com

Company phone: 020-82606879       

                                                   WeChat public account

With high quality and excellent service, Mingyin Technology is your best choice

 

Address: No. 1, Environmental Protection 2 Road, Zhongcheng Wisdom Park, Xintang Town, Zengcheng District, Guangzhou City

© 2021 广州铭音电子科技有限公司 版权所有. 博客 | XML | 网站地图 | 隐私政策 IPv6     备案号:粤ICP备17010293号

添加微信好友,详细了解产品
使用企业微信
“扫一扫”加入群聊
复制成功
添加微信好友,详细了解产品
我知道了