EP0263555A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Television transmission system
Assignee: Koninklijke Philips NV
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Filing: 1987-09-29
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Granted: —
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Expires: 2007-09-29
Abstract
Abstract In a television transmission system, for example, a community antenna television system the transmitter station transmits a teletext page in an information channel, which page indicates in which TV channels this transmitter station transmits programmes. A receiver associated with this system is directly tuned, after switching on, to this information channel or starts a searching action for this channel. Once tuned to this information channel the relevant teletext page is captured and the information regarding the TV channels is separated therefrom, decoded and stored in the form of tuning data in a tuning data memory. Each tuning datumcorresponds to one of these TV channels. In this manner the tuning data memory is automatically programmed, i.e. without the users' interposition, for all receivable TV programmes.
Inventors
- 👤 Wilhelmus Johannes Christis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 10:27
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/18; H04N21/00; H04N21/40; H04N21/47; H04N21/488; H04N21/4888; H04N5/00; H04N5/44; H04N5/445; H04N7/08; H04N7/087; H04N7/088; H04N7/0887; H04N7/10; H04N21/482; H04N5/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
228 words
A television transmission system comprising a transmitter and a receiver, the transmitter being provided with: - means for generating teletext data which represents at least a repetitive part of a teletext information page, which teletext data comprises information regarding the TV channels which are utilized by this transmitter for the transmission of TV programmes: - means for transmitting said teletext data in a transmission channel allotted thereto and denoted information channel; and the receiver being provided with: - a teletext decoding circuit for capturing and decoding teletext pages; - a tuning data memory for storing tuning data which are characteristic of transmission channels; - a receiver tuning circuit for tuning the receiver in response to a tuning datum applied thereto to the transmission channel characterized thereby; - a control circuit which is coupled to the teletext decoding circuit, to the tuning memory and to the tuning circuit and which is adapted to perform a store programme comprising the following steps: a) tuning the receiver to the information channel; b) capturing and decoding the teletext data transmitted in the information channel by the teletext decoding circuit; c) storing tuning data in the tuning data memory in response to the captured teletext information page, which tuning data are characteristic of the TV channels indicated on said teletext information page and utilized by the transmitter for the transmission of TV programmes.
Claim 2
Dependent Claim
228 words
A television transmission system comprising a transmitter and a receiver, the transmitter being provided with: - means for generating teletext data which represents at least a repetitive part of a teletext information page, which teletext data comprises information regarding the TV channels which are utilized by this transmitter for the transmission of TV programmes: - means for transmitting said teletext data in a transmission channel allotted thereto and denoted information channel; and the receiver being provided with: - a teletext decoding circuit for capturing and decoding teletext pages; - a tuning data memory for storing tuning data which are characteristic of transmission channels; - a receiver tuning circuit for tuning the receiver in response to a tuning datum applied thereto to the transmission channel characterized thereby; - a control circuit which is coupled to the teletext decoding circuit, to the tuning memory and to the tuning circuit and which is adapted to perform a store programme comprising the following steps: a) tuning the receiver to the information channel; b) capturing and decoding the teletext data transmitted in the information channel by the teletext decoding circuit; c) storing tuning data in the tuning data memory in response to the captured teletext information page, which tuning data are characteristic of the TV channels indicated on said teletext information page and utilized by the transmitter for the transmission of TV programmes.
Claim 3
Dependent Claim
70 words
A transmitter for use in a television transmission system as claimed in Claim 1 and being provided with: - means for generating a teletext data representing a repetitive teletext information page, which teletext information page comprises information regarding the TV channels which are utilized by said transmitter for the transmission of TV programmes; - means for transmitting said teletext data in a transmission channel allotted thereto and denoted information channel.
Claim 4
Dependent Claim
170 words
A receiver for use in a television transmission system as claimed in Claim 1 and being provided with: - a teletext decoding circuit for capturing and decoding teletext pages; - a tuning data memory for storing tuning data which are characteristic of transmission channels; - a receiver tuning circuit for tuning the receiver in response to a tuning datum applied thereto to the transmission channel characterized thereby; - a control circuit which is coupled to the teletext decoding circuit, to the tuning data memory and to the tuning circuit and which is adapted to perform a store programme comprising the following steps: a) tuning the receiver to the information channel; b) capturing and decoding the teletext data transmitted in the information channel by the teletext decoding circuit; c) storing tuning data in the tuning data memory in response to the captured teletext information page, which tuning data are, characterist ic of the TV channels indicated on said teletext information page and utilized by the transmitter for the transmission of TV-programmes.
Claim 5
Dependent Claim
193 words
A receiver for use in a television transmission system as claimed in Claim 1, and suitable for the reception of signals transmitted by a transmitter as claimed in Claim 2 and being provided with: - a teletext decoding circuit for capturing and decoding teletext pages; - a tuning data memory for storing tuning data which are characteristic of transmission channels; - a receiver tuning circuit for tuning the receiver in response to a tuning datum applied thereto to the transmission channel characterized thereby; - a control circuit which is coupled to the teletext decoding circuit, to the tuning data memory and to the tuning circuit and which is adapted to perform after reception of an appropriate command a store programme comprising the the following steps: a) tuning the receiver to the information channel; b) capturing and decoding the teletext data transmitted in the information channel by the teletext decoding circuit; c) storing tuning data in the tuning data memory in response to the captured teletext information page, which tuning data are characteristic of the TV channels indicated on said teletext information page and utilized by the transmitter for the transmission of TV programmes.
Claim 6
Dependent Claim
219 words
A television transmission system as claimed in Claim 1 with a transmitter and a receiver, the transmitter being provided with: - means for generating teletext data which represents at least a repetitive part of a teletext information page having an information page number; - means for transmitting said teletext data in a transmission channel allotted thereto and denoted information channel; and the receiver being provided with: - a teletext decoding circuit for capturing in response to a page number applied thereto the teletext page having said page number; - a tuning data memory for storing tuning data which are characteristic of TV channels; - a receiver tuning circuit for tuning the receiver in response to a tuning datum applied thereto to the TV channel characterized thereby: - a control circuit which is coupled to the teletext decoding circuit, to the tuning data memory and to the tuning circuit and which is adapted to perform a further store program comprising the following steps: a) applying the information page number to the teletext decoding circuit; b) searching a transmission channel in which the teletext information page having that particular information page number is transmitted; c) storing a tuning datum in response to the captured teletext information page in the tuning data memory, which tuning datum is chracteristic of the information channel.
Claim 7
Dependent Claim
43 words
A television transmission system as claimed in Claim 5 in which the information page number is a unique number so that the information channel is distinguished from other TV channels by the presence therein of a teletext page having said unique page number.
Claim 8
Dependent Claim
27 words
A receiver as claimed in Claim 3 or 4, provided with means which can be operated by the user for starting the or the further store programme.
References Cited (Backward Citations)
DE3335082A1
Cited
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