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### Bit rate and Bandwidth

Bandwidth

The bandwidth determines how much capacity is available on a certain channel to send or receive data. The required capacity for that channel is dependent on the amount of data being sent or received.

Bit-Rate

The bit-rate refers to the amount of data being transferred from one location to the other in a certain amount of time

In telecommunications and computing, bit rate (bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time.

The bit rate of a file tells us how many bits of data are processed every second. Bit rates are usually measured in kilobits per second (kbps).

### Calculating bit rate

The bit rate is calculated using the formula:

Frequency × bit depth × channels = bit rate

A typical, uncompressed high-quality audio file has a sample rate of 44,100 samples per second, a bit depth of 16 bits per sample and 2 channels of stereo audio. The bit rate for this file would be:

44,100 samples per second × 16 bits per sample × 2 channels = 1,411,200 bits per second (or 1,411.2 kbps)

A four-minute (240 second) song at this bit rate would create a file size of:

1,411,200 × 240 = 338,688,000 bits (or 40.37 megabytes)

### Bandwidth Trivia www.teachyourselfpython.com