bit rate
In telecommunications and computing, bit rate (sometimes written bitrate) is the number of bits that are conveyed or processed per unit of time.
audio bit rate
CD-DA, the standard audio CD, is said to have a data rate of 44.1 kHz/16, meaning that the audio data was sampled 44,100 times per second and with a bit depth of 16. CD-DA is also stereo, using a left and right channel, so the amount of audio data per second is double that of mono, where only a single channel is used.
The bit rate of PCM audio data can be calculated with the following formula:
For example, the bit rate of a CD-DA recording (44.1 kHz sampling rate, 16 bits per sample and 2 channels) can be calculated as follows:
The cumulative size of a length of PCM audio data (excluding a file header or other metadata) can be calculated using the following formula:
The cumulative size in bytes can be found by dividing the file size in bits by the number of bits in a byte, which is 8:
Therefore, 80 minutes (4,800 seconds) of CD-DA data requires 846,720,000 bytes of storage:
摄像机采样率32000的情况下 位深16bit 双声道的话 也才128KB
Perferences
https://en.wikipedia.org/wiki/Bit_rate
