But, the challenge for this technology is how to reduce image and digital video data rates.
This concise report gives an overview on the main features of video compression and different techniques used in this technology. And due to the rapid changes in this technology, online resources were the best choice for the content of this report. The report starts with video compression definitions, the report justifies the need for video compression. Then, gives a quick overview of the main standards used in video compression and a comparison of techniques used in this technology followed by factors to choose from different techniques. And in order to realize the fact of video today the report listed some of the problems with digital video. Finally, the report gives a conclusion and presents some future directions for the video compression technology.
Jim Duber once said, "The best description of compression is the one that said "Compression" is like making orange juice concentrate. Fresh oranges go in one end and concentrate comes out the other. The concentrated orange juice takes up less space, is easier to distribute, and so forth. There are different brands and types of concentrate to meet the consumers' needs or desires. Likewise, video compression takes a large file and makes it smaller. The smaller files require less hard disk space, less memory to run, and less bandwidth to play over networks or the Internet. Many compression schemes exist and have their specific strengths and weaknesses.
According to Video/Imaging DesignLine "Video compression algorithms" ("codecs") manipulate video signals to dramatically reduce the storage and bandwidth required while maximizing perceived video quality. Understanding the operation of video codecs is essential for developers of embedded systems, processors, and tools targeting video applications. For example, understanding video codecs' processing and memory demands is key to processor selection and software optimization.
There are other definitions for video compression. For example, TechEncyclopedia refers to "Video Compression" as "encoding digital video to take up less storage space and transmission bandwidth.". And Encyclopedian mentioned that Video compression "deals with the compression of visual video data. Video compression is necessary for efficient coding of video data in video file formats and streaming video formats."
The majority of online computing dictionaries define video compression as "Compression of sequences of images. Video compression algorithms use the fact that there are usually only small changes from one "frame" to the next so they only need to encode the starting frame and a sequence of differences between frames. This is known as "inter-frame coding" or "3D coding".
3. The Need for Video Compression
Video takes up a lot of space. So, Compression is needed to