![\"Diferencia](\"https:\/\/differbetween.com\/storage\/img\/images_1\/difference_between_abr_and_vbr.png\")
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Bitrate is an index that determines the quality of compressed video and audio. Bitrate is the number of bits per second, and in general, the higher the bitrate, the higher the quality. However, the file size will increase accordingly.<\/p>\n
![\"CBR,](\"https:\/\/admin-gu.ru\/images\/article_img\/network\/atm-qos\/atm-ubr-vbr-cbr.jpg\")
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The compression method is the behavior of the bitrate at the time of compression, which is the constant bitrate (CBR) method, variable bitrate (VBR), or average bitrate method (Bitrate average, ABR) . be classified.<\/p>\n
Constant Bit Rate (CBR) Characteristics
\nThe method of compressing with a constant bit rate is called the constant bit rate (CBR) method. Since the bitrate is fixed, it is not only easy to predict the file size after compression, but also search the playback position at high speed. However, there are problems with videos, such as the quality changing between scenes with little movement and scenes with lots of movement.<\/p>\n
WAVE and uncompressed AIFF can also be called CBR.<\/p>\n
advantage
\nIt is possible to predict the file size after compression
\nHigh-speed playback position search possible
\nDisadvantage
\nQuality tends to vary<\/p>\n
Variable Bit Rate (VBR) Features
\nThe method of compressing by changing the bit rate is called the variable bit rate (VBR) method. In the VBR method, the bit rate is high where the data jitters sharply, and the part where the jitter is gradual is low and compressed, so the quality can be kept constant as a whole and can be compressed with higher quality than CBR. .It is said that. However, the size of the compressed file is unpredictable because the bitrate changes from moment to moment. Also, it takes more time to search for playback position than CBR .<\/p>\n
advantage
\nEasy to control quality
\nhigh quality
\nDisadvantage
\nDifficult to predict the size of the compressed file
\nIt takes time to search for the playback position
\nAverage Bit Rate (ABR) Features
\nAlthough the bit rate is variable, the method of compressing with a constant average bit rate is called the average bit rate (average bit rate, ABR) method. Although the bitrate fluctuates with this method, the final size of the file can be predicted to some extent because it is compressed so that the average bitrate of all data is constant. This allows you to maintain quality like VBR and predict file size like CBR. However, it takes longer to process than other methods because the data must be scanned at least once before compression.<\/p>\n
advantage
\nIt is possible to maintain quality up to a certain point.
\nFile size can be predicted to some extent
\nDisadvantage
\nThe compression process takes time
\nBitrate method of major audio compression formats
\nMP3
\nCBR, VBR
\nWMA
\nCBR, VBR
\nCAA
\nVBR, ABR
\nOgg Vorbis
\nVBR, ABR<\/p>\n","protected":false},"excerpt":{"rendered":"