What is the ITU and ISO/IEC?
- IEC- IEC which is also known as “The International Electrotechnical Commission” is a company which provide security management.
- ITC – ITC which is also known as “The International Telecommunication Union” is a agency which is responsible for information and communication technologies also known as itc.
What Is A Codec?
A codec is a short term for compressor/decompressor. A codec is a type of computer program that “shirks” large movie files and makes them playable on the computer, For example a codec program allows you to play your media, play your downloaded music/movies. We all need codec’s .. reasons being for this, is because video and music files are large which results to it becoming difficult to transfer over the internet, therefore, codecs”helps” speed up downloads, without codecs, downloads would take probably twice as longer as they usually do. Within the codec family, hundreds of codecs are being used on the internet. There are Codecs for audio and video compression, streaming media (over the internet). The most common codecs people use are MP3,WMA,RealVideo, RealAudio,DivX and XviD (there are many more, but those are just to name a few)
Name some codec packs that you can get for Mac
Containers
A container contains components of any video. A good example of a container is that you can have multiple soundtracks and subtitles included in a video file, if the container format allows it. The most known/ popular containers are OGG, Matroska, AVI, MPEG.
Name 3 examples of containers.
- AVI
- WAW
- MOV
Comparing Lossy with Lossless…..
Lossy
A lossy compressions is a “data encoding” method that compresses data by losing some of it, the reasons why people would use this method, would be to minimise the amount of data that needs to be held, handed or transmitted by a computer. the lossy compression is the most commonly used to compress multimedia data which includes things such as audio, video, and still images.
Lossless
A lossless data compression is a technique which allows the original data to be reconstructed from the compressed data. This technique can reduce the space needed by only about 50%, It is important to use a lossless compression technique when compressing data and programs.
Motion JPEG
Motion JPEG is a type of codec which allows high quality realtime Motion JPEG encoding. JPEG stands for Joint Photographic Experts Group. Motion JPEG is a video format that use JPEG picture compression in each frame of the video. MJep is used in very high quality video captures, MJEP is also a format which many people recommend to use in video capturing processes as a raw data format, as editing will be very easy and encoding the edit mjep stream into final format.
MPEG-4
MPEG-4 is a graphic and video “Lossy compression” meaning “audio and video”, MPEG-4 is a method which is for video/audio encoding purposes. MJEP-4 provides users with a wide range of interaction with various animated objects.
H.264
H.264 Is a videocompression format. H.264 is a new codec, which can achieve high quality video in “relatively low bitreates” H.264 which is also known as MPEG-4 AVC was developed for use in high definition systems such as HDTV, Blue-ray and HD DVD. H.264 offers better quality at low file sizes than both MPEG-2 and MPEG-4 ASP (DivX or XviD)
Pro-Res 422 (intermediate)
Pro-Res 422 is a lossy video compression which was developed by Apple Inc. Pro-rRes 4222 is a software which is highly recommended for anyone shooting DSLR, HDV,AVCHD,XDCAM ED, XCAM HD, AVCAM, or P2. Pro-Res provides good image quality, with full sizes. “ProRes 422 most closely matches the original image quality”
Pro-Res 4444
Pro-Res 4444 is a lossy video compression format which was developed by Apple Inc. Pro-Res 444 is the fifth version.Pro-Res creates smaller files, with higher quality, Pro-Res “simplifies” editing process, Pro-Res 4444 is considered to be one of the “best” in terms of quality and as a transfer format Pro-Res is great.
DV and HDV
DV and HDV are both video formats. The difference between the two is that HDV and DV video formats is that HDV records high definition and DV records in standard definition.
DV Additional Points
- Stands for Digital Video
- Was 720 by 480 pixels
- Standard Definition
HDV Additional Points
- Much cleaner picture
- High definition
- Stands for High Definition Video
- 1920 by 1080 pixels or 1280 by 720 pixels
Ttwarna Malika 