 NTSC interference rejection filter |
| One aspect of the present invention is to provide a system and method which enables the removal of ... |
|
| Receiver for analog and digital television signals |
| What is claimed is: 1. A receiver comprising: a tuner for converting input signals to IF signals, ... |
|
| Image processing apparatus and method for reproducing at least an image from a digital data sequence |
| The present invention has been made to solve the aforementioned problems and to provide a function ... |
|
| Single-LNB satellite data receiver |
| OF THE PREFERRED EMBODIMENTS The present invention eliminates the cost and inconvenience of ... |
|
| Television receiver |
| A television receiver according to the present invention, comprises: a first receiving means for ... |
|
| First baseman's mitt |
| In the development of gloves, several key elements are utilized in the design. First, on the dorsal ... |
|
| Closed-caption scrolling method and apparatus suitable for syllable characters |
| It is an object of the present invention to solve the problems involved in the prior art, and to ... |
|
| Edition system |
| I claim: 1. An edition system comprising a main recording and reproducing apparatus and a computer, ... |
|
|
Television system distributing a dynamically varying number of concurrent video presentations over a single television channel
| Details |
Inventors: Pocock, Michael; Lodberg, Allan; Coumans, Peter;
Assignee: Liberate Technologies, Inc. (San Carlos, CA)
Primary Examiner: Harvey; D. E.
Assistant Examiner:
Attorney, Agent or Firm: Burns, Doane, Swecker & Mathis, L.L.P.
A method and system for providing, in a television system, the combination, transmission, and reception of multiple video presentations over a single channel of a television distribution system. Presentations may be concurrently broadcast for viewing by many users, as well as interactively requested for display by many (potentially a thousand or more) individual users. A presentation consists of a sequence of images which reproduce a full motion, reduced motion, or a still image video presentation for the user when displayed. The signal is transmitted in a standard television format, and consists of a sequence of video images from the various presentations being transmitted. A user terminal receiving the transmitted signal is selectably operable to display one of the multiple transmitted presentations with accompanying audio. The terminal identifies the video images of the selected presentation, stores and displays the images on an associated television receiver. The number of concurrent presentations, and the degree of motion in the presentations are dynamically variable. Interactive instructions between a user at the terminal end and the presentation system are transmitted by an associated telephone line or other communications link. |
|
DETAILED DESCRIPTION The present invention provides a television system which increases the capacity of television channels by exploiting the fact that certain presentations do not require the full image capacity of a dedicated television channel and therefore the excess capacity can be used to distribute images of additional presentations over that channel.
A television signal having multiple video presentations is transmitted over a single television channel.
In an exemplary embodiment of the invention, one video presentation could comprise a motion video program and other presentations could pertain to a still-frame interactive video service.
The television signal is produced by a multiplexer which combines the still-frame interactive video images and motion video images into a standard (such as NTSC) sequence of images for transmission.
In one embodiment of the invention, each of the interactive video images has an identification associated therewith so that these images can be distinguished from the full motion video images, which have a distinct associated identification.
A user terminal which receives the transmitted television signal can be selectably operable to display different presentations.
A selection corresponds to one of the video presentations transmitted in the television signal, and causes a television receiver connected thereto to display only the corresponding video presentation.
In the specific example described above, the terminal can display either the motion presentation or a still-frame interactive presentation.
To display a selected presentation, the terminal identifies the video images of the television signal corresponding to the selected presentation, stores the selected images, and displays them on an associated television set.
Interactive instructions between a user at the terminal end and the presentation system are carried out via the use of a communication link such as a telephone line.
Other applications of the invention are also possible.
The television signal could combine two or more motion video presentations whose content is such that each presentation can be displayed at less than the standard television rate without significant quality loss to the viewer
|
|
Television 
