The audio signal 16bit (bit/bit, which is a measurement unit of data.) means the transmission rate of audio signal data is 16 bytes per second.
Bit, a computer term, is a unit of information, which is transliterated from the English BIT. It is also a bit in a binary number, a measurement unit of information, and the smallest unit of information.
Audio signals are information carriers of regular sound wave frequency and amplitude changes with speech, music and sound effects. According to the characteristics of sound waves, audio information can be classified into regular audio and irregular sounds. Regular audio can be divided into speech, music and sound effects.
A sound wave or sine wave has three important parameters: frequency, amplitude and phase, which determine the characteristics of the audio signal.
Extended information:
1. Indicators of audio signals:
1. Frequency bandwidth: The wider the frequency band of the audio signal, the more audio signal components it contains. The richer, the better the sound quality.
2. Dynamic range: The larger the dynamic range, the larger the relative change range of signal strength, and the better the sound effect.
3. Signal-to-noise ratio: Signal-to-noise ratio SNR is the abbreviation for the ratio of useful signal to noise. Noise can be divided into environmental noise and equipment noise. The greater the signal-to-noise ratio, the better the sound quality.
4. Subjective measurement method: Human sensory mechanism is the most decisive for sound measurement. Perceptual, subjective testing is an indispensable part of evaluating sound quality. Of course, reliable subjective measures are harder to come by.
2. Bits:
The physical factor that affects the size of the sound is the amplitude. The sound on the computer must also be able to accurately represent the soft sound of the music, so the amplitude of the sound wave must be Have a precise description.
"Bit" is such a unit. It can be represented by numbers. The higher the bit rate, the more detailed the changes in sound can be reflected.
In order to reflect normal sound information, 16bit is the basic requirement, and better CDs use 20bit or even 24bit.
Reference material: Baidu Encyclopedia-Bit
Reference material: Baidu Encyclopedia-Audio signal