mpeg is a digital storage "dynamic" image compression coding and audio coding standard. The MPEG standard video compression coding technology mainly uses inter-frame compression coding technology with motion compensation to reduce temporal redundancy, uses DCT technology to reduce the spatial redundancy of images, and uses entropy coding to reduce information representation. Statistical redundancy.
The operating environment of this tutorial: Windows 10 system, Dell G3 computer.
mpeg is a digital storage "dynamic" image compression coding and audio coding standard.
MPEG (Moving Picture Experts Group, Moving Picture Experts Group) is a specialized organization established in 1988 by ISO (International Standardization Organization, International Standardization Organization) and IEC (International Electrotechnical Commission, International Electrotechnical Commission). An organization that develops international standards for motion picture and speech compression.
MPEG standards mainly include the following five, MPEG-1, MPEG-2, MPEG-4, MPEG-7 and MPEG-21, etc. The expert was established in 1988 and is responsible for establishing video and audio standards for CDs. Its members are technical experts in the fields of video, audio and systems. Later, they successfully separated the recording of sound and images from the traditional analog method, established the ISO/IEC11172 compression coding standard, and formulated the MPEG-format, bringing audiovisual communication into the digital age. Therefore, the MPEG-X version that everyone refers to now is the compression standard for video, audio, and data formulated and released by ISO (International Organization for Standardization).
MPEG standard video compression coding technology mainly uses inter-frame compression coding technology with motion compensation to reduce temporal redundancy, uses DCT technology to reduce spatial redundancy of images, and uses entropy coding to Reduces statistical redundancy in information representation. The comprehensive application of these technologies greatly enhances compression performance.
Advantages
1. The algorithm is specially designed for conditions such as low bandwidth, so MPEG4 has a higher compression ratio, making low bit rate video transmission possible. Video can be continuously transmitted over public telephone lines and maintain image quality, which is something other technologies cannot do.
2. Save storage space. Under the same conditions such as scene, image format and compression resolution, the smaller the encoded image file is, the smaller the storage space it takes up. Since the MPEG-4 algorithm is more optimized than MPEG-1 and MPEG-2, it has higher compression efficiency.
3． Image quality is good. The highest image definition of MPEG4 is 768X576, which is far better than the 352X288 of MPEG1, and can achieve a picture effect close to that of DVD. This makes its images very good in high definition. In addition, due to algorithm limitations of other compression technologies, the image quality decreases when fast-moving people or objects and large scene changes appear in the picture. MPEG4 uses object-based recognition coding mode to ensure good clarity.
For more related knowledge, please visit theFAQcolumn!
The above is the detailed content of mpeg is what image compression coding and audio coding standard for digital storage. For more information, please follow other related articles on the PHP Chinese website!