What Is Bit Rate?

Bit rate refers to the number of bits transmitted per second. The unit is bps (Bit Per Second). The higher the bit rate, the more data per second and the clearer the picture quality. The bit rate in sound refers to the amount of binary data per unit time after converting an analog sound signal into a digital sound signal, and is an indicator that indirectly measures the audio quality. The principle of bit rate (code rate) in video is the same as that in sound, which refers to the amount of binary data per unit time after conversion from analog signals to digital signals.

Bit rate refers to the number of bits transmitted per second, also known as the data signal rate, in units of bits per second (bit / s or bps), kilobits per second (kbit / s or kbps, k = 1000), or megabits per second (Mbit / s or Mbps, M = 1000000). The higher the bit rate, the more data is transmitted per unit time.
Bit rate and

In the field of communications and computers, the bit rate (Bit rate,

The baud rate indicates the number of symbol symbols transmitted per second. It is an index to measure the data transmission rate. It is expressed by the number of times the carrier modulation state changes in a unit time.

In the information transmission channel, the signal unit carrying data information is called a symbol. The number of symbols transmitted through the channel per second is called the symbol transmission rate, which is referred to as the baud rate. The baud rate is an indicator of the bandwidth of the transmission channel.

Bit rate in numbers

Bit rate is the number of bits transmitted per second. The unit is bps (Bit Per Second). The higher the bit rate, the

Bit rate refers to the amount of binary data per unit time after converting an analog sound signal into a digital sound signal. The larger the bit rate, the better the sound quality (under the same encoding format, different formats cannot be compared). As a reference indicator of digital music compression efficiency,

Bit rate in video (

The relationship between the bit rate of APE and the sound quality has the following views:

1. The higher the bit rate of APE, the better the sound quality 2. The bit rate of APE is not related to the sound quality 3. The bit rate of APE is determined by the compression ratio.

Monkey & # 39; s Audio 4.08 UI

First, what exactly determines the bit rate of APE? After several experiments, it was found that the bit rate of the APE was determined by both the characteristics of the original CD itself and the parameters adopted when suppressing the APE. The characteristics of the original CD are the main factors. WAV files captured by the same CD, with different parameters when using monkey compression, will result in slightly different bit rates of the APE (about 50Kbps). The higher the compression ratio, the lower the bit rate. The difference in the characteristics of the original CD will cause a very large difference in the APE bit rate (which can reach about 500Kbps). This feature includes the sample size (BIT) during the master recording, and the dynamic range of the music itself. Symphony is considered to have a greater dynamic range than vocal vocals). The 20-bit and 16-bit CDs produced by APE have very different APE bit rates. 24BIT CDs (such as many XRCDs) can produce APEs with a bit rate of more than 1000, and ordinary 16BIT APE bit rates can only hover around 700Kbps. This is why there are so many gaps in the APE bit rate that many online CDs are licensed by genuine CDs.

The relationship between bit rate and sound quality. APE is lossless audio, so different compression ratios will lead to different bit rates, which means that you can't use the bit rate to determine the sound quality. There is also a strong argument: when converting MP3 to APE format, the bit rate can also reach more than 700Kbps / s. However, it cannot be said that APE bit rate has nothing to do with sound quality. Under the premise of ensuring that the original CD is compressed, the same compression parameters, the higher the APE bit rate, the greater the dynamic range of the music, the more detailed and clear the details!

Bit rate is a quantifier describing the amount of space occupied by data per unit time. The size of the space occupied by the data per unit of time × time = the size of the space occupied by the data bit rate of the audio file (any format) = the size of the space occupied by the audio file / the length of the music. Here are three examples: (WAV, APE, MP3 one each)

Wave: "Forgotten Time" takes up a total of 166 seconds and occupies 29,388,284 Bytes. The bit rate is 1411,000 bits / second. The conversion formula is:

8 bit = 1Byte, 1024 Bytes = 1KB, 1024 KB = 1MB, 1411000bit / S × 166S = 234226000bit234226000bit / 8 = 29,278,250Bytes

APE: "The Moon Represents My Heart" takes up a total of 263 seconds and occupies 20,537,862 Bytes. The bit rate is 624000bit / second. 624000bit / second × 263 seconds.

MP3: "The Mood for Love" takes a total of 247 seconds and occupies 3,955,652 Bytes. The bit rate is 128000bit / second. 128000bit / second × 247 seconds = 31616000bit.