2. Concept of Compression SL 4.2 There are several methods can be implemented to compress animation, such as;  Reducing aspect ratio; eg. from 640 x 480 to 320 x 240.  Reducing frame rate; eg. from 30 fps to 15 fps.
3. CODEC SL 4.3 Compression/Decompression algorithm (CODEC) has been developed to reduce the file size and enables animation to be stored in one storage media, such as CD or hard disk. A codec is software that is used to compress or decompress a digital media file, such as a song or video.
4. CODEC SL 4.4 In general, CODEC runs compression and decompression of data, where data will be compressed into smaller packets so that it can be stored and distributed easily.  Compression replaces pixels with mathematical instructions, resulting much smaller size of file.  Decompression decodes the mathematical instruction back into pixels.
5. Data Compression SL 4.5 Example of data compression software:  7 ZIP, Advance Comp, Bzip2, File Roller, Gzip, P7zip, PNGOUT, Pngcrush, Zlib, Winrar, Winzip, Sensor TRANSMISSION Reconstructed Data Data Compressed Compressed Data Data Compressor Decompressor Storage
6. Lossy and Lossless SL 4.6 Lossless  Lossless compression enables user to compress the size of animation without affecting the quality.  Resulting much smaller compression ratio.  Uses Run Length Encoding  E.g: WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWW WWWWWWWWWWWWWWWWWWWWWBWWWWWWWW WWWWWW  =12W 1B 12W 3B 24W 1B 14W
7. Run Length Encoding SL 4.7 7 4 2 7 3 Compression in Run Length Encoding ABBBBBBBBBCDEEEEFUsing RLE compression, the compressed file takes up 10 bytes andcould look like this: A *8B C D *4E F
8. Lossy and Lossless SL 4.8 Lossy  Lossy compression can reduce the size of file smaller than lossless compression.  Resulting much larger compression ratio.  Erasing some bit data may result low quality display in animation.  Eg: JPEG Original Image High compression (lossless PNG, 60.1 (98% less KB size) — information than uncompressed is uncompressed 108.5 KB PNG, 1.14 KB
9. Compression/Decompression Standard SL 4.9 Motion Picture Expert Group (MPEG)  MPEG use asymmetric algorithm where the mathematical instructions will determine data for each frames.  MPEG will only recording location and moving object only, while static images will be recorded once and be used over and over again.
10. Compression/Decompression Standard SL 4.10 Cinepak  Using vector algorithm compression where it enables video clip or animation be played at a fast rate.  Cinepak is a QuickTime software
11. Compression/Decompression Standard SL 4.11 Apple’s QuickTime  Using lossy compression, it can produce compression at a ratio 5:1 up to 25:1.  Advantages:  Plug-in for QuickTime (known as QuickTime Players) distributed free of charge.  Does not require special equipment for playback or distribution.  Disadvantages:  Small display area.  Requires large RAM and hard disk because of its large size of file.
12. Compression/Decompression Standard SL 4.12 SWF - Shockwave Flash  Advantage : File size is small for a complex animation DCR – Interactive in nature  Developed by Macromedia Director  Used for distribution through web, due to its file size
13. Compression/Decompression Standard SL 4.13 MOV –  Use to distribute animation file in video format  Advantages :  cross platform  good quality of audio and video presentation AVI - Audio Video Interleave  distributing animation file in video format  quality of presentation is less compared to MOV
14. Compression/Decompression Standard SL 4.14 MPEG - to set standards for audio and video compression and transmission Have several levels of functionality:  MPEG-1: Initial video and audio compression standard, used as the standard for Video CD and Layer 3 (MP3) audio compression format  MPEG-2: video and audio standards for broadcast quality television. Used for digital television, digital satellite TV services, digital signals, and for DVD video discs.
15. Compression/Decompression Standard SL 4.15 MPEG-4: Expands MPEG-1 to support video, audio or 3D content. MPEG-7: A formal system for describing multimedia content.
16. Compression/Decompression Standard SL 4.16 GIF  Factors that make GIF most commonly used:  Support transparency to image.  Animation played non-stop.  Cross-platform.  Doesn’t require any kind of plug-in.  Disadvantages:  Not supporting audio file format.  No interactivity.  Only 256 colors.