Sony NWZ-X1051F Operation Guide - Page 140
What is video format?, Useful Facts
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Table of Contents Index 140 Useful Facts What is the relationship between bit rate, sound quality, and storage size? Generally, higher bit rates provide better sound quality, but require more storage space for the same length of audio, so you can store fewer songs on the player. Lower bit rates enable you to store more songs, but at a lower sound quality. Note If you import a song from a CD to your computer at a low bit rate, you cannot improve the song's sound quality by selecting a high bit rate when transferring the song from the computer to the player. What is video format? Video format refers to the method used when importing video and audio data to a computer and saving it as a video file. Common formats include MPEG-4 and AVC, etc. MPEG-4: MPEG-4 refers to Moving Picture Experts Group phase 4, developed by the MPEG working group of the ISO (International Organization for Standardization). The compression format is for video and audio data. AVC: AVC refers to Advanced Video Coding, developed by the MPEG working group of the ISO (International Organization for Standardization). It enables reproduction of more vivid images at a lower bit rate. AVC files include four profiles, and "AVC Baseline Profile" is one of them. AVC format is based on the MPEG-4 AVC standard of the ISO (International Organization for Standardization), and since AVC is standardized as the MPEG-4 Part 10 Advanced Video Coding, it is commonly referred to as MPEG-4 AVC/H.264 or H.264/AVC. WMV: WMV (Windows Media Video) is a video compression format developed by Microsoft Corporation. It was built upon MPEG-4, achieves a high compression rate, and supports copy control by DRM. What is photo format? Photo format refers to the method used when importing images to a computer and saving them as image files. Common formats include JPEG, etc. JPEG: JPEG (Joint Photographic Experts Group) is a common image compression format developed by the JPEG. JPEG can compress an image file to about 1/10 to 1/100 the size of original image files. Hint For details on supported file formats and bit rates, see page 173.