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Author

P. Venkat Rangan

Bio: P. Venkat Rangan is an academic researcher from Amrita Vishwa Vidyapeetham. The author has contributed to research in topics: Server & The Internet. The author has an hindex of 32, co-authored 110 publications receiving 5873 citations. Previous affiliations of P. Venkat Rangan include University of Maryland, College Park & University of California, Los Angeles.


Papers
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Proceedings ArticleDOI
01 Jun 2002
TL;DR: The goals of this study are to extend the understanding of wireless user behavior and wireless network performance, and to characterize wireless users in terms of a parameterized model for use with analytic and simulation studies involving wireless LAN traffic.
Abstract: This paper presents and analyzes user behavior and network performance in a public-area wireless network using a workload captured at a well-attended ACM conference. The goals of our study are: (1) to extend our understanding of wireless user behavior and wireless network performance; (2) to characterize wireless users in terms of a parameterized model for use with analytic and simulation studies involving wireless LAN traffic; and (3) to apply our workload analysis results to issues in wireless network deployment, such as capacity planning, and potential network optimizations, such as algorithms for load balancing across multiple access points (APs) in a wireless network.

566 citations

Patent
01 Jun 1998
TL;DR: In this paper, a client-computer-based "video on web VCR" software system is described, where the main video scene, and/or any thumbnail image, show as hotspots, with text annotations typically appearing upon a cursor "mouse over".
Abstract: Streaming compressed digital hypervideo received upon a digital communications network is decoded (decompressed) and played in a client-computer-based "video on web VCR" software system. Scene changes, if not previously marked upstream, are automatically detected, and typically twenty-one past scenes are displayed as thumbnail images. Hyperlinks within the main video scene, and/or any thumbnail image, show as hotspots, with text annotations typically appearing upon a cursor "mouse over". All hyperlinks--as are provided and inserted by, inter alia, the upstream network service provider (the "ISP")--may be, and preferably are, full-custom dynamically-resolved to each subscriber/user/viewer ("SUV") upon volitional "click throughs" by the SUV, including retrospectively on past hypervideo scenes as appear within the thumbnail images. Hyperlinking permits (i) retrieving information and commercials, including streaming video/hypervideo, from any of local storage, a network (or Internet) service provider ("ISP"), a network content provider, and/or an advertiser network site, (ii) entering a contest of skill or a lottery of chance, (iii) gambling, (iv) buying (and less often, selling), (v) responding to a survey, and expressing an opinion, and/or (vi) sounding an alert.

517 citations

Journal ArticleDOI
TL;DR: This tutorial highlights the unique issues and data storage characteristics that concern designers in the real-time processing of multimedia data.
Abstract: Real-time processing of multimedia data is required of those who offer audio and video on-demand. This tutorial highlights the unique issues and data storage characteristics that concern designers. >

465 citations

Patent
22 Jan 1999
TL;DR: An authoring system for interactive video has two or more authoring stations for providing authored metadata to be related to a main video data stream and a multiplexer for relating authored metadata from the authoring sources to the main data data stream.
Abstract: An authoring system for interactive video has two or more authoring stations for providing authored metadata to be related to a main video data stream and a multiplexer for relating authored metadata from the authoring sources to the main video data stream. The authoring stations annotate created metadata with presentation time stamps (PTS) from the main video stream, and the multiplexer relates the metadata to the main video stream by the PTS signatures. In analog streams PTS may be created and integrated. In some embodiments there may be multiple and cascaded systems, and some sources may be stored sources. Various methods are disclosed for monitoring and compensating time differences among sources to ensure time coordination in end product. In different embodiments transport of metadata to an end user station is provided by Internet streaming, VBI insertion or by Internet downloading. User equipment is enhanced with hardware and software to coordinate and present authored material with the main data stream.

404 citations

Patent
02 Apr 1998
TL;DR: In this article, the VOW server interprets each hyperlink request in consideration of the identity of the exercising client SUV and additional data of a demographic, socioeconomic, credit, viewing preference, security and/or past hyperlinking history nature.
Abstract: Streaming digital hypervideo including copious embedded hyperlinks is distributed upon a digital communications network from a hypervideo server, normally an Internet Service Provider, to multitudinous client subscribers/users/viewers (client SUVs). Some or all of the client SUVs receive the same hyperlinks at the same place in the streaming hypervideo. Some small fraction of the client SUVs selectively volitionally exercise a fraction of the total hyperlinks, causing an access in the background of the unfolding hypervideo across the digital communications network to yet another server commonly called a "Video On Web server", or "VOW server". The VOW sever interprets each hyperlink request in consideration of (i) the identity of the exercising client SUV and, most commonly, (ii) additional data of a demographic, socioeconomic, credit, viewing preference, security and/or past hyperlinking history nature. The VOW Server supplies each hyperlink-exercising client SUV with a potentially custom hyperlink --normally in the form of a network universal resource locator (URL) or an index to a file of URLs--while keeping track of commercially useful data regarding the client SUV response(s). Each client SUV uses its own associated received URL to retrieve a potentially unique resource. The resource can be internal, such as an executable software program, but is normally located somewhere on the network and is typically in the nature of tailored and/or targeted advertisements, messages of personal or local or temporal pertinence and/or urgency, and/or the results of contests or lotteries. Hypervideo hyperlinks are thus dynamically resolved during streaming network communications to support full custom hyperlinking by each of multitudinous networked client SUVs.

359 citations


Cited by
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Patent
20 Aug 2007
TL;DR: In this paper, a system for utilizing metadata created either at a central location for shared use by connected users, or at each individual user's location, to enhance user's enjoyment of available broadcast programming content is presented.
Abstract: A system for utilizing metadata created either at a central location for shared use by connected users, or at each individual user's location, to enhance user's enjoyment of available broadcast programming content. A variety of mechanisms are employed for automatically and manually identifying and designating programming segments, associating descriptive metadata which the identified segments, distributing the metadata for use at client locations, and using the supplied metadata to selectively record and playback desired programming.

2,229 citations

Patent
11 Sep 1998
TL;DR: In this paper, a method and system for placing an order to purchase an item via the Internet is described, where an order is placed by a purchaser at a client system and received by a server system.
Abstract: A method and system for placing an order to purchase an item via the Internet. The order is placed by a purchaser at a client system and received by a server system. The server system receives purchaser information including identification of the purchaser, payment information, and shipment information from the client system. The server system then assigns a client identifier to the client system and associates the assigned client identifier with the received purchaser information. The server system sends to the client system the assigned client identifier and an HTML document identifying the item and including an order button. The client system receives and stores the assigned client identifier and receives and displays the HTML document. In response to the selection of the order button, the client system sends to the server system a request to purchase the identified item. The server system receives the request and combines the purchaser information associated with the client identifier of the client system to generate an order to purchase the item in accordance with the billing and shipment information whereby the purchaser effects the ordering of the product by selection of the order button.

1,828 citations

Patent
24 May 1996
TL;DR: In this paper, the authors present an information and advertising distribution system, in which a data server stores and updates a database of information items and advertisements, each categorized so that each has an associated information category.
Abstract: In summary, the present invention is an information and advertising distribution system. A data server stores and updates a database of information items and advertisements. The information items and advertisements are each categorized so that each has an associated information category. Workstations remotely located from the data server each include a display device, a communication interface for receiving at least a subset of the information items and advertisements in the data server's database and local memory for storing the information items and advertisements received from the data server. An information administrator in each workstation establishes communication with the data server from time to time so as to update the information items and advertisements stored in local memory with at least a subset of the information items and advertisements stored by the data server. An information display controller in each workstation displays on the workstation's display device at least a subset of the information items and advertisements stored in local memory when the workstation meets predefined idleness criteria. At least a subset of the workstations include a profiler for storing subscriber profile data. The subscriber profile data represents subscriber information viewing preferences, indicating information categories for which the subscriber does and does not want to view information items. The information display controller includes a filter for excluding from the information items displayed on the display device those information items Inconsistent with the subscriber profile data.

1,788 citations

Patent
06 Dec 2019
TL;DR: In this paper, the authors present methods and systems relating to location-based services such as social networking, providing demographic information, tracking mobile devices, providing business information, providing an adaptable user interface, remotely effecting a change on a portable electronic device, providing a geofence, outputting locationbased information on a mobile device, varying transmissions to and from a mobiledevice, providing locationbased alerts, verifying transactions and tailoring information to the behavior of a user.
Abstract: Provided herein are methods and systems relating to location-based services such as social networking, providing demographic information, tracking mobile devices, providing business information, providing an adaptable user interface, remotely effecting a change on a portable electronic device, providing a geofence, outputting location-based information on a mobile device, varying transmissions to and from a mobile device, providing location-based alerts, verifying transactions and tailoring information to the behavior of a user.

1,653 citations

Patent
18 Nov 2002
TL;DR: In this paper, a system for integrating video programming with the vast information resources of the Internet is presented, where the web pages are synchronized to the video content for display in conjunction with a television program being broadcast to the user at that time.
Abstract: A system for integrating video programming with the vast information resources of the Internet. A computer-based system receives a video program with embedded uniform resource locators (URLs). The URLs, the effective addresses of locations or Web sites on the Internet, are interpreted by the system and direct the system to the Web site locations to retrieve related Web pages. Upon receipt of the Web pages by the system, the Web pages are synchronized to the video content for display. The video program signal can be displayed on a video window on a conventional personal computer screen. The actual retrieved Web pages are time stamped to also be displayed, on another portion of the display screen, when predetermined related video content is displayed in the video window. As an alternative, the computer-based system receives the URLs directly through an Internet connection, at times specified by TV broadcasters in advance. The system interprets the URLs and retrieves the appropriate Web pages. The Web pages are synchronized to the video content for display in conjunction with a television program being broadcast to the user at that time. This alternative system allows the URLs to be entered for live transmission to the user.

1,504 citations