Other Free Encyclopedias » Online Encyclopedia » Encyclopedia - Featured Articles » Contributed Topics from A-E

Audio and Video Information in Multimedia News Systems

modern images text services

Definition: Contemporary news systems contain today visual media including audio and video information.

Historically most relevant information concerning progress in sciences and the growth of general information within human knowledge and accessible to mankind has been documented in written text and occasionally described in images and maps. The technological developments of the 20th century has brought tools and communication channels that increased the ways of communicating and distributing news concerning all facets of human live in various ways. Multimedia news services involve now besides enormous amounts of digitized textual information also images, audio and video material, supported by multiple technical tools for seamless integration and modern distribution.

Image captures people’s thrills, emotions, and concerns. Art can shock or inspire, and news images cover most relevant events over the entire globe. Most readers depend on visual and multimedia contents to understand the world around them and as a basis for further creative activities. The popularity of visual media such as photos, videos, and animations attests to their mainstream acceptance.

Technically, multimedia integration has been adopted to middleware software and content management applications to allow a seamless integration with current news management and distribution applications. XML standards like SMIL provide synchronization and integration frameworks and document description standards that cope with traditional and future text information and multimedia data that support modern user’s needs.

Modern multimedia services integrate content types of text, images, audio data and streams and current video formats such as MPEG2, MPEG4, MPEG7 and multimedia broadcasting technologies and initiatives like MHP and DVB for providing future interactive digital news access via television, internet and mobile devices.

General purpose news editing systems integrate easy-to-use textual interfaces, mostly based on Web architectures, with modern multimedia features like video studios, composing for example MPEG-4 audio-visual scenes (cf. MPEG-4 STUDIO in).

Modern Internet protocols like HTTP for web-based presentation of text and images, and streaming protocols such as RTSP for audio and video streaming cover the distribution and presentation services of multimedia news systems. Besides the technical enabling of news presentation and distribution, multimedia news services have to face legal and commercial constraints. Recent misuse by illegal file sharing or copyright violence has introduced security topics to multimedia news services. Besides customer oriented access restrictions and modern billing systems, multimedia news have been enriched with up to date encrypting mechanisms. Especially for audio and video formats, the time constraints in encoding and decoding live streams have introduced challenges which are met by modern approaches such as encryption and watermarking for copyrighted MPEG. Multimedia data security is vital for multimedia commerce. Early cryptography have focused and solved text data security. For multimedia applications, light weight encryption algorithms as discussed in are attractive and appropriate.

Audio Compression and Coding Techniques - Introduction – Audio Properties, Audio Digitization Codec, The Human Hearing/Vocal Systems and Audio Coding [next] [back] Audience Researchers - The Famous “Nielsen Ratings”, Becoming an Audience Researcher, On the Job as Audience Researcher

User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or