误码率计算（Bit error rate calculation）.docVIP

误码率计算（Bit error rate calculation） Rate directory [hidden] Define average rate Technical ratio defines average bitrate Technical proportion [edit this paragraph] definition Bit rate is the number of bits of data transmitted by unit time during data transmission. In general, we use Kbps, that is, thousands of bits per second. Popular understanding is sampling rate, the greater the sampling rate in unit time, the higher the accuracy, the closer the processed file is to the original file, that is, the richer the detail of the picture. Average bitrate Generally refers to the average rate of digital music or video. For example, if the average rate of an MP3 file is 128kbps, that is to say, on average, 128000 bits per second are transmitted / decoded. Bit rate is not the only standard to measure audio / video quality, for example, some other formats, such as wma and Ogg, can provide better sound quality at the same average bitrate as the MP3 file. The ABR is a mean value for MP3, you will see the rate you specify (such as 222KBPS) is the current player as decompression of choice, and the constant bit rate is at a fixed compression ratio file. Bitstream x time = total capacity Here we should note that the bitstream of the unit, 1 byte (B) = 8 bits (b), the capacity of our computer files, K/M, refers to the B; 1 Kilobyte (K/KB) =2^10 bytes=1024 bytes bytes; 1 Megabyte (M/MB) =2^20 bytes=1048576 bytes megabytes; So if you use the bits/s bitstream to calculate the capacity, remember to delete 8. [edit this paragraph] technical ratio However, the size of the file is proportional to the sampling rate, i.e., the higher the bitrate, the larger the size of the video file. So almost all of the attention of the encoding format is how to achieve the minimum distortion with the lowest rate, around this core derived from the early CBR (fixed rate) and now VBR (variable bit rate), are done in this article. (fixed rate) means fixed rate when making video. The change of variable rate refer