Home Theater Systems Research Articles

Ontology-enabled validation of connectivity relationships in a home theater system

This article describes a vision for team-based synthesis of engineering systems, enhanced by technologies for ontology-based computing, cast in a Semantic Web framework. Our long-term research objective is to fully understand the extent to which relationships and constraints in ontology-based descriptions of problem domains, working together with description logic reasoning engines, can influence and improve system-level design procedures, particularly in the early stages of development where errors may have a significant long-term impact, but if detected early are cheap to correct. As a first step, we develop a port–jack ontology for a home theater system and exercise rule sets for combinations of correct/incorrect connectivity. The model checking procedure begins with the formulation of a port–jack ontology that will describe allowable constraining relationships in the port and jack connectivity. Allowable types of connections are expressed in the form of domain restrictions. © 2006 Wiley Periodicals, Inc. Int J Int Syst 21: 1111–1125, 2006.

Intelligent sound field tuning system for home theater systems

In this paper, we propose an intelligent sound field tuning system for home theater systems that includes room acoustic compensation and additive artificial sound field processing. Room acoustic compensation is performed based on the information about room transfer characteristics measured by a three-channel microphone array. With a three-channel microphone array, we estimate the exact angular position, distance, level, and frequency response of loudspeakers. Using this information, the proposed system can compensate the degradation induced by non-ideal loudspeaker arrangement with virtual loudspeaker positioning and binaural energy level alignment algorithm. After room acoustic compensation, additive artificial sound field processing is performed for more realistic spacious impression. For artificial sound field processing, directional impulse responses are measured in real acoustic space by three-channel microphone array.

46.1: Invited Paper: Advances in Contrast Enhancement for DLP Projection Displays

AbstractIncreased contrast ratios are essential to the continued success of DLP™ products in the marketplace, from rear projection televisions and home theatre systems to large venue displays and DLP Cinema™. The contrast of DLP projection systems has increased steadily over the past 5 years due to improvements in illumination and projection optics, as well as changes to the DMD itself. The authors will present an overview of contrast performance of DLP projectors over time as well as describe illumination and projection techniques that optimize the performance of the DMD.

Intelligent agent-based systems for personalized recommendations in Internet commerce

The prosperity of electronic commerce has changed the traditional trading behaviors and more and more people are willing to conduct Internet shopping. However, the exponentially increasing information provided by the Internet enterprises causes the problem of overloaded information, and this inevitably reduces the customer's satisfaction and loyalty. One way to overcome such a problem is to build personalized recommender systems to retrieve product information that really interests the customers. For products that people may purchase relatively often, such as books and CDs, recommender systems can be built to reason about a customer's personal preferences from his purchasing history and then provide the most appropriate information services to meet his needs. On the other hand, for those commodities a general customer does not buy frequently, for example computers and home theater systems, more appropriate are the kinds of recommender systems able to retrieve optimal products based on the customer's current preferences obtained from the iterative system–customer interactions. This paper presents the above two kinds of recommender systems we have developed for supporting Internet commerce. Experimental results show the promise of our systems.

Bass management system for home theater equipment

A setup to be used in a home theater or sound reproduction system for handling low frequency sound signals with a signal source providing several full bandwidth digital sound channels and at least one digital low frequency subwoofer channel includes a delay-and level control unit at least for each full bandwidth signal channel, which is equipped for a speaker not capable of reproducing low frequency sounds. A first summing stage creates the sum channel by summing the delay-and level controlled signal channels. A second summing stage adds a low frequency subwoofer channel to the sum channel in order to create a digital bass channel. A DA-conversion, amplifying, lowpass-filtering and volume control unit processes the digital bass channel in order to create an analog bass channel.

A Study on the New Concept Design of Home Theater System (1)

A Study on the New Concept Design of Home Theater System (1)

A Study on the new Concept Design of Home Theater System (2)

A Study on the new Concept Design of Home Theater System (2)