Interactive television system with partial character set generator

A technology of interactive TV and generator, which is applied to the components of TV system, TV, color TV, etc. It can solve the problems of slow interactive system and unacceptable

Inactive Publication Date: 2006-01-18
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because character sets must be transferred at regularly recurring intervals to be substantially immediately a

Method used

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  • Interactive television system with partial character set generator
  • Interactive television system with partial character set generator
  • Interactive television system with partial character set generator

Examples

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Embodiment Construction

[0013] Referring first to Figure 1, an interactive television system is shown. The broadcast signal is transmitted by the broadcaster of the broadcast center 10 . The broadcast signal is sent to viewers by satellite transmitter 12 or terrestrial link 18, such as coaxial circuit or fiber optic cable. In the case of a satellite link, the signal transmitted by transmitter 12 is received by satellite 14 and relayed to antenna 16 of the viewer. The received signal is decoded and detected by the set top box 20 and displayed on the television 22 . The set-top box is controlled by a user control 24, which may be a wired control or a remote control. The viewer uses the controller to select a desired program or to interact with the broadcast content, such as by the viewer by selecting a product or service to purchase.

[0014] figure 2 The operation of the broadcast center 10 and the set-top box 20 is shown in more detail. A video / audio stream 32, which may include conventional tel...

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PUM

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Abstract

An interactive television system includes a partial font generator (38) which generates a character font file of only those fonts used by a given application program for text display. The partial font file contains the language character fonts utilized by the application program, but less than the complete character set of the language. Thus, the partial font file thus requires less time or bandwidth to transmit in the allotted transmit intervals. The partial font file may be generated by a manual process, or by an automated analysis of the fonts used by an application program.

Description

technical field [0001] This invention relates to interactive television systems, and more particularly to interactive television systems that generate and use partial character sets for language display. Background technique [0002] In interactive television, video and audio streams and applications are multiplexed together to form one stream called a transport stream. The transport stream is broadcast to the viewer and received by the viewer's television receiver. Transport streams are typically handled by set-top boxes, which are specially designed to process and execute applications interleaved with video and audio data in the transport stream. Applications may provide viewers with unique or auxiliary information about the broadcast, such as program listings and real-time text annotations, or interactive applications may provide, for example, the ability to purchase goods or services via the television. [0003] Digital TV set-top boxes are based on many different hard...

Claims

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Application Information

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IPC IPC(8): H04N5/445
CPCH04N21/23617G06F17/214H04N21/23614H04N21/4348H04N5/44508H04N21/8126H04N21/8166H04N21/8146H04N21/4856H04N21/4433G06F40/109H04N21/434H04N21/431H04N21/45
Inventor 甘亮谭径微D·P·凯利P·S·纽顿J·史
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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