Various file formats are discussed in multimedia computing D

Various file formats are discussed in multimedia computing Discuss any two file formats (mention about the file headers of these also)

Solution

1.Portable network graphics(PNG): A Raster graphics file format which enhances the lossless data compression and also palette_based images containing 24_bit RGB or 32_bit RGBA color and full color palette_based images over the internet.they are outlined to transfer the images through internet.This png files almost with PNG or png extension.

File header: It initiates through 8 byte signature

Value usage

89 high bit set to detect transmission systems which do not enhance 8 bit data

50 4E 47 In Ascii the letters PNG permits a person to recognize format simply when observed intext editor

0D 0A A CLRF to detect DOS Unix line ending transformation of data.

.....................................................................................................................................................................

2.ogg:These file formats are extended with .ogg and they are able to format many number of independent sequences for the audio,video and metadata.In ogg multimedia ,theora offers a lossy video layer .The audio layer is much frequently music aligned vorbis format .lossless audio compresion formats contain FLAC and OggPCM.

The creators of ogg tells that the unlimited with software patents are oulined to offer the energitic sequence and operation of high quality digital multimedia.

file header: 8 Bits

Bit value flag Page type

0 0x01 continuation initial packet on this page which was a continuation of last packet in logical bitstream

1 0x02 BOS Begining of stream

2 0x04 EOS End of stream