A codec is a device or computer program for encoding or decoding a digital data stream or signal. Codec is a portmanteau of coder-decoder. According to different technical principles of audio compression, audio compre...A codec is a device or computer program for encoding or decoding a digital data stream or signal. Codec is a portmanteau of coder-decoder. According to different technical principles of audio compression, audio compression coding methods have their own characteristics. This paper considers that the coding quality is high and the digital rate is also high. In addition, according to the compressed data whether exists information loss, data compression coding can also be divided into two forms, which is lossless compression and lossy compression. Lossy compression method also called compression method for the amount of information. Lossy compression is always larger, widely used in audio compression. It is also familiar to us. However, for the more critical to the quality of people, especially the music enthusiast, lossy compression of audio files often cannot meet their quality on the requirements, and it is very necessary and lossless compression. Firstly, this paper has designed and executed tests to compare the performance ofcodecs by using my methodology. Then, it has analysed the results. Finally, there are conclusions on the relative merits of the codecs selected and some recommendations.展开更多
文摘A codec is a device or computer program for encoding or decoding a digital data stream or signal. Codec is a portmanteau of coder-decoder. According to different technical principles of audio compression, audio compression coding methods have their own characteristics. This paper considers that the coding quality is high and the digital rate is also high. In addition, according to the compressed data whether exists information loss, data compression coding can also be divided into two forms, which is lossless compression and lossy compression. Lossy compression method also called compression method for the amount of information. Lossy compression is always larger, widely used in audio compression. It is also familiar to us. However, for the more critical to the quality of people, especially the music enthusiast, lossy compression of audio files often cannot meet their quality on the requirements, and it is very necessary and lossless compression. Firstly, this paper has designed and executed tests to compare the performance ofcodecs by using my methodology. Then, it has analysed the results. Finally, there are conclusions on the relative merits of the codecs selected and some recommendations.
