Digital Video
Activity 18 requires me to answer the following:
1. List three analog video formats
- PAL-Phase Alternating Line
- NTSC-National Television Standards Committee
- SECAM-Sequential Colour with Memory
2. What advantages does digital video have over analog video?
- Digital video has a better quality
- Only limited by network bandwidth
- Able to be used on computers
- Allows for two-way viewing (video communication via the Internet and web cam {On Computers})
3. What is a disadvantage of digital video?
Digital videos are comprised of too much information, so to maintain the illusion of motion they need to be processed at a constant rate. These can be illuminated, but with an impact on file size or quality. Without cocompression digital video requires a computer with enough processing power to play back 33.2Mb per second.
4. List and briefly describe three common digital file formats.
AVI-Audio Video Interleaved. This is a multimedia format used to store audio and video.
WMA-Windows Media Audio. Name for products from Microsoft that can create, deliver and play streaming files.
MOV-The file format generated by Quick Time software originally only available for playback on Macintosh OS
5. List 3 ways of reducing the file size of a digital video.
- Compressing the video data.
- Reducing the dimensions of each frame.
- Reducing the frame rate.
6. What is a codec?
Codec is an acronym for compression/decompression. A codec is a specialized computer program that compresses or reduces the number of bytes consumed by large files. Video files are encoded by the codec when compressed and will require the same codec to enable them to be decompressed and then played.
7. Define and breifly describe blu-ray disc.
A blu-ray disc is an optical disc media storage format. It’s main uses are high definition video and data storage.
And so I have,
=Pandora=
