Internet video broadcasting is increasingly the medium of choice for the delivery of video entertainment and news. There are no geographical limitations or technical licensing requirements for broadcasting over the Internet, to which each produce and distribute multimedia to a global audience possible. Content producers have a lot of technical options for creating video for broadcasting on the Internet, the method of coding of video, content delivery method, and also at the endView user requirements for the video. It is important for content producers to understand these options.
Multimedia encoding is the most important technical considerations for Internet Broadcasting. It is necessary to compress the content into a manageable amount of data, as video production created a massive amount of digital data. Without reducing the size of the uncompressed video content would require very large amounts of multimedia network resources for contentdistribution and electronic storage. This would effectively limit the ability to transport and store the video data and prevent that content from being delivered in a cost effective manner.
The goal of video encoding is to achieve the greatest amount of data compression while maintaining the best visual quality and clarity of the original content. Specialized software applications called codecs for encoding / compression of video content. This technical term stands for coder / decoder orCompressor / decompress. Codecs use complex mathematical algorithms, and specialized processes to compress the data, which can keep the video content on their quality and clarity. Most codecs use algorithms to lossy compression, multimedia compression, by the rest allows for easy modification of the contents are encoded. Which is driving the encoded video is somewhat different from the initial content, but still provides quality visual representation.
There are manycodecs, which can be used for encoding video content for radio, with each one with unique properties. Some of them are copyrighted and may the purchase of an end-user license, and some are open source that do not require the purchase of an end-user license. Technical limitations on the use of these codecs may include the following: specific operating system requirements, bandwidth restrictions encoder, encoder system resource utilization or end-user playback softwareRequirements.
Here is a list of current open-source and proprietary codecs that are available for use with Internet video broadcasting:
Open source codecs
Dirac uses wavelet compression instead of discrete cosine transforms as a basis for compression algorithm. It promises results comparable to or better than the current proprietary codecs such as H.264.
Theora is VP3 derivative. Theora is aimed at improving the original VP3 implementation by optimizing theEncoder software codec and the actual structure.
VP3 uses a tiered approach to video encoding. These steps include the discrete cosine transforms, quantization, Run Length Encoding, zig-zag order, differential, motion compensation, entropy coding, Variable Length Run Length Booleans, YUV Colorpsace and frame type. This codec uses a special feature that the encryption of data from the bottom up rather than top to bottom.
Proprietary codecs
H.264 is known as MPEG-4Part 10 or MPEG-4 AVC. It uses block-orientation and motion estimation in order to achieve superior compression performance compared to other video codecs.
VP6 – The current generation of the VP codec is called True Motion. Some of the major milestones of the VP6 include the support for multi-pass encoding, improved error handling, and direct access to the data reconstruction buffers.
Windows Media Video based on MPEG-4 AVC is based. The current version of WMV has achieved some improvements thatincludes native support for interlaced video, non-square pixels and frame interpolation.
RealVideo uses a very accurate motion modeling, proprietary spatial pixel prediction methods Context-adaptive entropy coding, psycho-visually tuned segmentation, filtering systems, rate distortion optimized encoding algorithms and two-pass encoding.
Both proprietary and open source codecs offer many unique features that the most important feature is the ability to offer quality videoPresentations at low bandwidths, and the ease of use for end users. Excessive consumption of bandwidth can limit the capability of the video content to a wide audience and sophisticated software for audience participants will be delivering up to deter people from viewing the multimedia.
The understanding of the process of video coding and multimedia compression is important. The choice of the appropriate codec for an Internet broadcast will ensure the production of video quality thatwill be available for the spectators. It is also important to ensure adequate network and computer resources to the requirements for the broadcast have support.
