Video Search Engines

Today’s World Wide Web is truly a video Web. Millions of video clips are available to users instantly thanks to widely available broadband IP networks, low-cost storage and mature digital video delivery technologies. The content of this video runs the gamut from skateboarding antics captured on mobile phone cameras up through graduate level university lecture […]

Addressing the Opportunity (Video Search Engines)

Realizing that inexpensive storage, ubiquitous broadband Internet access, low cost digital cameras, and nimble video editing tools would result in a flood of unorganized video content, researchers have been developing video search technologies for a number of years. The recent trends in digital video creation and delivery technology have brought the need for such tools […]

Classification of Web Video Sites (Video Search Engines)

As users browse the Web, they are likely to encounter video on almost any site. If we focus on the sites that appear to be video portals or claim to offer video search, we can begin to discern several categories of video search sites. To complicate the matter, there are hundreds if not thousands of […]

Classification of Video Sources (Video Search Engines)

As we discuss video search, it is important to keep in mind that the nature and quality of video varies widely depending on the application. The value of video can be difficult to judge; we can assess this on many dimensions such as image quality, or more subjective aspects such as educational, entertainment or historic […]

Challenges of Video Search (Video Search Engines)

Searching requires browsing sets of candidate results. Video is a continuous (or linear) medium: if paused, only a single frame remains, audio is lost. Text is displayed in a more parallel fashion and can therefore be browsed easily. Video storage and transmission requirements are several orders of magnitude greater than those for text. Textual features […]

Advantages of Video Search over Text (Video Search Engines)

Given all these aspects which make video search more difficult than text search, together with the fact that text search engines are far from perfect themselves, it may be surprising that successful video search systems have been deployed at all. This may be explained by considering areas where video search is less problematic than text […]

Metadata vs. Content (Video Search Engines)

Metadata is “data about data,” or in this case “data about media.” Global metadata refers to the entire media assets and typically includes a title, author, copyrights, etc. While almost every video application supports global metadata in some form [DC03], for some applications additional sets of metadata may pertain to segments of the media – […]

Introduction to Video Data Sources and Applications

To further illustrate the challenges and opportunities for video search, this topic will address the nature, availability, and attributes of different sources of video data. Search engines leverage all available information relevant to media and this topic will provide details about available metadata for different types of video including electronic program guides, content identifiers, video […]

Essential Media Metadata (Video Data Sources and Applications)

Embed Global Metadata Some level of metadata is embedded within the media stream, either as a header for use in decoding or rendering, or as an additional logical bitstream multiplexed within the media. In addition, metadata can be maintained in separate files that refer to the media file or collections of files (packages or channels) […]

Metadata for Personal Media Collections (Video Data Sources and Applications)

Consumer Media Libraries Fig. 2.4 shows a typical user interface for authoring this level of metadata. In this example, these represent fields in the Content Description Object in Microsoft’s ASF specification [ASF04]. While these are five core attributes used by many Microsoft applications [Loomis04], ASF also supports an Extended Content Descriptor Object to include other […]