It reduces or completely discards information in certain frequencies and areas of the picture that the human eye has limited ability to fully perceive. MPEG-1 Video exploits perceptual compression methods to significantly reduce the data rate required by a video stream. AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates. It is designed to compress VHS-quality raw digital video and CD audio down to 1.5 Mbit/s (26:1 and 6:1 compression ratios respectively) without excessive quality loss, making video CDs, digital cable/satellite TV and digital audio broadcasting (DAB) possible.Īdvanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. MPEG-1 is a standard for lossy compression of video and audio. Motion Picture Experts Group File Interchange Format
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