A practical guide to video and audio compression: from by Cliff Wootton

By Cliff Wootton

Research all approximately formats - how they paintings, in addition to layout and implementation with this entire, easy-to-use consultant to compression. After examining this publication, it is possible for you to to organize and distribute expert audio and video on any platform together with streamed to the net, broadcast on-air, saved in PVRs, Burned onto CD-ROMs or DVDs, brought via broadband, or considered in Kiosk functions, PDA units, and cellular phones.Key benefits:* study from an award-winning technologist for a most sensible media corporation who understands find out how to clarify formats in phrases you could comprehend* This entry-level advisor includes transparent causes and hundreds and hundreds of diagrams - no math heritage wanted! additionally contains a accomplished thesaurus which serves as an invaluable connection with many technical phrases and jargon you'll stumble upon* the right way to decide on definitely the right strategy to get the main from your compression process - saving either space for storing and funds

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Museums featuring scientific or engineering subjects may also have sections devoted to filmmaking. 1 Gate and Film Transport Mechanism The film is pulled through the gate of the camera and projector by a claw mechanism that is driven by a cam or eccentric motion of some kind. This is easier to understand if it is shown visually. Figure 4-1 demonstrates how this mechanism works. As the motor drives the eccentric cam around, the claw is moved up and down and in and out. This is a vastly simplified example and the actual mechanism is a bit more complicated than this, but the principle is the same.

This helps us to assess the best way to encode it. We also know something about the target size and the delivery mechanism. That will help us choose players and codecs. Now we can consider the scenario from the other end. The material we use will be sourced in a range of formats, and we need to know something about how each one works. What Are We Trying to Compress? 1 Where Do You Want to Go Today? That was a very good advertising line dreamed up by Microsoft. It is full of adventure and potential excitement and is based on you, the consumer, making a choice.

Video may need to be encrypted as well as encoded. Other technologies such as watermarking are used, and these present additional technical problems. This is all addressed in more detail in Chapter 18, where DRM is covered extensively. In general, the rights protection techniques that are available impose further loads on an already hardworking compression system. The nature of news content is that the material must be encoded quickly and presented as soon after the event as possible. uk/news/ Why Video Compression Is Needed 23 Figure 2-7 BBC News’ broadband video console.

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