Compression Techniques
Multimedia Compression techniques
4.0 Introduction
In this unit we are discussing about the data compression which is very important for multimedia applications because uncompressed graphics, audio, and video data require considerable storage capacity. Compressing a data file reduces its size, and hence it can be easily transferred over the digital network. The amount of compression depends on the compression method and compression rate. The terms compression and coding are treated as synonyms. The different compression techniques available and their classification is also given in this unit.
4.2 Data compression
As already we know the multimedia applications makes use of various components like text, graphics art, audio, animation and video. All these are stored in the form of files and it contains binary numbers 0 and 1. Uncompressed graphics , audio and video data files require considerable storage capacity, in case of uncompressed video the requirement is even more, and given the today's technology it is not even possible. The same is true for multimedia communications, where different files are to be transferred to various locations on the network. Data transfer uncompressed video on the digital network requires very high bandwidth to be provided for a single point - to - point communication. To provide feasible and cost effective solutions, most multimedia systems handle compressed digital video and audio data streams. Compressing a data file reduces its size, and hence it can be easily transferred over the digital network. The amount of compression depends on the compression method and compression rate. The terms compression and coding are treated as synonyms.
There are many compression techniques for multimedia information compression. They can be classified in many ways according to
4.0 Introduction
In this unit we are discussing about the data compression which is very important for multimedia applications because uncompressed graphics, audio, and video data require considerable storage capacity. Compressing a data file reduces its size, and hence it can be easily transferred over the digital network. The amount of compression depends on the compression method and compression rate. The terms compression and coding are treated as synonyms. The different compression techniques available and their classification is also given in this unit.
4.2 Data compression
As already we know the multimedia applications makes use of various components like text, graphics art, audio, animation and video. All these are stored in the form of files and it contains binary numbers 0 and 1. Uncompressed graphics , audio and video data files require considerable storage capacity, in case of uncompressed video the requirement is even more, and given the today's technology it is not even possible. The same is true for multimedia communications, where different files are to be transferred to various locations on the network. Data transfer uncompressed video on the digital network requires very high bandwidth to be provided for a single point - to - point communication. To provide feasible and cost effective solutions, most multimedia systems handle compressed digital video and audio data streams. Compressing a data file reduces its size, and hence it can be easily transferred over the digital network. The amount of compression depends on the compression method and compression rate. The terms compression and coding are treated as synonyms.
There are many compression techniques for multimedia information compression. They can be classified in many ways according to