Birthday Cards

A greeting card is an illustrated, folded card featuring an expression of friendship or other sentiment. Although greeting cards are usually given on special occasions such as birthdays, Christmas or other holidays, they are also sent to express thanks or other care. Greeting cards, usually packaged with an envelope, come in a variety of styles, are manufactured as well as hand-made by hundreds of companies big and small. These days, greeting cards with die-cuts or glued on decorations may cost up to five dollars each.

Hallmark Cards and American Greetings are the largest producers of greeting cards in the world. In the United Kingdom, it is estimated that one billion pounds are spent on greeting cards every year, with the average person sending 55 cards per year.

In the United States, many adults traditionally mail Christmas cards to their friends and relatives in December. Many service businesses also send cards to their customers in this season, usually with a universally acceptable non-religious message such as "happy holidays" or "seasons's greetings". read more……..

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What is Video and its type?

Video (Latin for "I see", first person singular present, indicative of videre, "to see") is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing scenes in motion. Video technology was first developed for television systems, but has been further developed in many formats to allow for consumer video recording. Video can also be viewed through the Internet as video clips or streaming media clips on computer monitors.

Video art is a type of art which relies on moving pictures and is comprised of video and/or audio data. (It should not however be confused with television or experimental cinema). Video art came into existence during the 1960s and 1970s, is still widely practised and has also given rise to the widespread use of video installations.

Video resolution
The size of a video image is measured in pixels for digital video or horizontal scan lines and vertical lines of resolution for analog video. In the digital domain (e.g. DVD) standard-definition television (SDTV) is specified as 720/704/640×480i60 for NTSC and 768/720×576i50 for PAL or SECAM resolution. However in the analog domain, standard definition equates to about 240×480 (NTSC) or 240×576 (PAL) pixels for VCR quality, to 400×480 (NTSC) or 400×576 (PAL) pixels for TV broadcasts (i.e. the number of horizontal scanlines [from top to bottom] remain constant, but the horizontal resolution [from left to right] varies). Aspect ratio is preserved because of non-square "pixels". read more.......

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Digital Video

Digital video is a type of video recording system that works by using a digital, rather than analog, representation of the video signal. This generic term is not to be confused with the name DV, which is a specific type of digital video targeted at the consumer market. Digital video is most often recorded on tape, then distributed on optical discs, usually DVDs. There are exceptions, such as camcorders that record directly to DVDs, Digital8 camcorders which encode digital video on conventional analog tapes, and camcorders which record digital video on hard disks.

History of digital Video:
Digital video was first introduced in 1983 with the Sony D-1 format, which recorded an uncompressed standard definition component video signal in digital form instead of the high-band analog forms that had been commonplace until then. Due to the expense, D-1 was used primarily by large television networks. It would eventually be replaced by cheaper systems using compressed data, most notably Sony's Digital Betacam, still heavily used as a field recording format by professional television producers. read more.......

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