GB2423658A - Teletext display on television remote control - Google Patents

Teletext display on television remote control Download PDF

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Publication number
GB2423658A
GB2423658A GB0501615A GB0501615A GB2423658A GB 2423658 A GB2423658 A GB 2423658A GB 0501615 A GB0501615 A GB 0501615A GB 0501615 A GB0501615 A GB 0501615A GB 2423658 A GB2423658 A GB 2423658A
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GB
United Kingdom
Prior art keywords
content signal
signal
data
presentation apparatus
teletext
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0501615A
Other versions
GB0501615D0 (en
Inventor
Trevor P Collins
Connor Carmichael
Andrew J Duignan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Priority to GB0501615A priority Critical patent/GB2423658A/en
Publication of GB0501615D0 publication Critical patent/GB0501615D0/en
Publication of GB2423658A publication Critical patent/GB2423658A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0882—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of character code signals, e.g. for teletext
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
    • H04N21/41265—The peripheral being portable, e.g. PDAs or mobile phones having a remote control device for bidirectional communication between the remote control device and client device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details
    • H04N21/42208—Display device provided on the remote control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details
    • H04N21/42208—Display device provided on the remote control
    • H04N21/42209—Display device provided on the remote control for displaying non-command information, e.g. electronic program guide [EPG], e-mail, messages or a second television channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/488—Data services, e.g. news ticker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

A content signal presentation apparatus comprises a broadcast receiver (205) which receives a broadcast content signal, such as a TV signal, over a broadcast air interface. The broadcast content signal comprises embedded text data such as teletext data. An embedded text processor (213) extracts data from the broadcast content signal and generates a second signal comprising the text data. The second signal is then transmitted to a remote terminal (203) over a second air interface by a short range transmitter (215). The remote terminal (203) receives the second signal in a short range receiver (223). The text data is then retrieved and processed by a text display processor (225) which subsequently presents the text data on a display (227) of the remote terminal (203). The invention may for example allow teletext data to be presented on a display of a remote control for a television.

Description

::. . *: :: 2423658 * S e** S.. * S S I * S * * * S I I S *S* * . A
CONTENT SIGNAL PRESENTATION APPARATUS, A REMOTE CONTROL
AND A METHOD OF PRESENTING TEXT
Field of the invention
The invention relates to a content signal presentation apparatus, a remote control and a method of presenting text, and in particular, but not exclusively, to presentation of teletext data.
Background of the Invention
Television (TV) and radio transmissions are widely used for effective wide area distribution and provision of real time content. Originally, only the content itself was transmitted but it has since become increasingly widespread to include various data together with broadcast radio and TV programmes.
Best known is the inclusion of teletext data in standard analogue TV transmissions. This technique comprises embedding text data in the analogue TV signal by encoding the data and modulating it onto the analogue TV signal during time intervals wherein the analogue signal does not carry visual information. Specifically, the teletext data is included following a synchronisation pulse which results in the data being added during time intervals where the electronic beam of the cathode ray tube is outside the visible screen area.
*S. : *. .*. : * * S S S S S S Se * S **S *SS * * S S * S S * S S S S * 2. * Teletext capable TV receivers comprise a teletext decoder which extracts the transmitted text data from the received analogue TV signal. In addition, the TV receivers comprise a text display generator that can generate a video signal of a given teletext page and present this on the display of the television.
In recent years, transmission of digital TV signals has been rolled out in many areas and it is expected that digital TV transmissions will gradually replace analogue TV transmissions. Digital TV transmissions comprise a digitally encoded signal which is decoded at the TV receiver for presentation on the display. Similarly to analogue TV, digital TV comprises provision for teletext services and indeed comprises provision for significantly more complex and interactive services than known for analogue TV transmissions. In digital TV, the teletext data is typically comprised as a data stream which is interleaved with the content data stream or which is transmitted in parallel to this data stream.
Similarly, radio services are known which transmit embedded text data together with the radio signal. For example, analogue RDS transmissions include text data. Similarly, digital radio services, such as Digital Audio Broadcasting (DAB), are becoming increasingly popular and typically comprise embedded text data which may be presented by the radio receiver. For example, the radio receiver may display the name of the radio station and the title of the song being played.
* * * * S..
* . S * * S * S * S S S S S S * *S * S SI. SI. * S S S * S S S S S S S * * 3 151 I S Indeed, it is generally becoming increasingly popular to transmit text data together with content broadcasts in order to provide an enhanced user experience.
However, although such text data may be presented to the user of the device to provide an improved user experience, some disadvantages are associated with the current approach.
For example, conventional teletext data is presented on the display of a TV receiver. This requires that the TV display is viewable from the user's current position and thus restricts the usability. Furthermore, if the display is used for presenting teletext information, the TV programme cannot be viewed at the same time or at least can only be viewed on part of the screen. Furthermore, a TV receiver is typically located at some distance from the normal viewing position and this may render the displayed text difficult to read for users with impaired vision. Furthermore, the teletext display will be limited by the characteristics of the TV display.
It will be appreciated that some or all of these disadvantages apply to other systems broadcasting content signals with embedded text data.
Hence, an improved system for presentation of embedded text data would be advantageous and in particular a system allowing increased flexibility, improved visibility, reduced impact on the presentation of a content signal, improved presentation of text and/or an enhanced user experience * * S S *S* * S S * S * S S * S * * S S * S IS * S 155 eI* S S S S * S S S * 5 5 p * 5 4... . S
Summary of the Invention
Accordingly, the Invention seeks to preferably mitigate, alleviate or eliminate one or more of the above mentioned disadvantages singly or in any combination.
According to a first aspect of the invention there is provided a content signal presentation apparatus comprising: means for receiving a broadcast content signal over a broadcast air interface, the broadcast content signal comprising embedded text data; means for extracting text data from the broadcast content signal; means for generating a second signal comprising the text data; and means for transmitting the second signal to a remote terminal over a second air interface.
The invention may allow an improved user experience as embedded text data may be used by and/or presented on a remote terminal. This may improve visibility and/or readability as the presentation is not restricted by characteristics of the content signal apparatus.
Furthermore, an improved presentation may be provided. For example, more text may be presented at once than can be presented by the content signal presentation apparatus. The complexity requirements of the remote terminal may be kept low as the extraction of the embedded data is performed at the content signal presentation apparatus. Thus, the remote terminal may e.g. directly receive the text data.
Furthermore, the bandwidth of the second air interface may be low as text data typically requires only small data amounts.
* . * * S..
* S * S * S S a * * * * S * * S SI * * SS* *** * S S S * * . * S S S S * S S*S S S Alternatively or additionally, the invention may allow that embedded text data is presented simultaneously with a full screen presentation of the content signal by the content signal presentation apparatus.
The remote terminal may specifically be a remote control of the content signal presentation apparatus. The text data transmitted in the second signal may be the unmodified embedded text data or may be text data derived According to an optional feature of the invention, the second signal comprises only data related to the text data.
This may allow a very low communication requirement of the second signal. The data related to the text data may in some embodiments consist in the text data and possibly data indicative of how the text data is processed, such as text formatting data.
According to an optional feature of the invention, the content signal presentation apparatus further comprises means for receiving control data from the remote terminal and the means for generating the second signal is operable to select a subset of text data in response to the control data.
This may provide for an efficient and low complexity implementation. For example, the remote terminal may specify text, such as a teletext page, and the content signal presentation apparatus may transmit a second signal comprising only the selected text thereby minimising the data to be transmitted. Furthermore, the remote terminal may * * * S *eS * . S S * S I S S * S S * S S a *i * S *S *** S I I S * S I I S S S S * 6 1 simply present the text data of the second signal without necessarily performing any further processing of this.
According to an optional feature of the invention, the means for generating the text signal is arranged to convert between a text data protocol associated with the broadcast signal and a text data protocol associated with the remote terminal. This may allow additional flexibility and may allow that the text data of the second signal is adapted to the characteristics of the second air interface and/or the characteristics of the remote terminal.
According to an optional feature of the invention, the content signal presentation apparatus further comprises means for presenting the text data on a display of the content signal presentation apparatus. This may provide an enhanced user experience and further flexibility. For example, the text data may be presented on the content signal presentation apparatus simultaneously with a presentation on the remote terminal. Furthermore, the same or different text may be presented allowing an increased choice of viewing options or an increased amount of text being presented.
According to an optional feature of the invention, the content signal presentation apparatus further comprises means for selecting between presenting the text data on the display and transmitting it to the remote terminal. This may provide increased flexibility and may for example allow a user to select where to view the text data.
I I qe.
* *r.. S * I * S * S S - * *5 * I III SI. S I S I * S S S S S S S * S.. I I According to an optional feature of the invention, the second air interface is a short range air interface. A short range air interface may be particularly advantageous for many embodiments wherein the remote terminal is located relatively close to the content signal presentation apparatus. The second air interface may be a short range air interface having a typical range of less than 300 meters. In particular, the second air interface may be a Bluetooth1M air interface.
According to an optional feature of the invention, the text data is teletext data. The invention may provide an enhanced teletext user experience.
According to an optional feature of the invention, the means for extracting comprises a teletext decoder. This may provide a practical and low complexity implementation.
According to an optional feature of the invention, the broadcast content signal is a television signal. The invention may provide an enhanced user experience for a television signal embedded text service.
According to an optional feature of the invention, the second air interface has a shorter range than the broadcast air interface. The second air interface may specifically have a typical range which is five times shorter than a typical range of the broadcast air interface.
According to an optional feature of the invention, the embedded text data is meta-data associated with a content signal of the broadcast signal. The invention may provide an * . S *** * S 9. * * , S S * 9 5 9 * *94 59. * * - I * * 55 * * **.
enhanced user experience. The meta-data may for example be content descriptive data such as a title of the content or an artist associated with the content.
According to a second aspect of the invention, there is provided a remote control for a content signal presentation apparatus comprising: means for transmitting control signals to the content signal presentation apparatus; means for receiving teletext data; a display; and means for presenting text of the teletext data on the display.
The invention may provide an improved remote control providing an improved user experience. The complexity of the remote control may be kept low.
According to an optional feature of the invention, the remote control further comprises means for storing a plurality of teletext pages. This may improve the user experience as delays associated with teletext retrieval may be reduced.
According to an optional feature of the invention, the remote control further comprises means for selecting a teletext page of the plurality of teletext pages and wherein the means for presenting text is operable to present the selected teletext page. The remote control may comprise means for selecting between teletext pages without interfacing with the content signal presentation apparatus.
This may improve the user experience and may particularly allow a very fast presentation of selected teletext pages on the remote control. Additionally or alternatively, the I I I *I * , I * * I * I * - I I I I S I *
S S III I I S I
I. S.5.5 ISI i S requirements for communication over the second air interface and from the remote control to the content signal presentation apparatus may be reduced.
According to a second aspect of the invention, there is provided a method of presenting text comprising: receiving a broadcast content signal at a content signal presentation apparatus over a broadcast air interface, the broadcast content signal comprising embedded text data; extracting text data from the broadcast content signal; generating a second signal comprising the text data; transmitting the second signal to a remote terminal over a second air interface; receiving the second signal at the remote terminal; and presenting the text data on a display of the remote terminal.
These and other aspects, features and advantages of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter.
Brief Description of the Drawings
Embodiments of the invention will be described, by way of example only, with reference to the drawings, in which FIG. 1 illustrates a TV receiver and a remote control in accordance with some embodiments of the invention; FIG. 2 illustrates a more detailed arrangement of a content signal presentation apparatus and remote terminal in accordance with some embodiments of the invention; and * * . . * * S * . S I P S * S IS * I III *SI I I I I * Ib. *.
FIG. 3 illustrates a method of presenting text in accordance with some embodiments of the invention.
Detailed Description of Embodiments of the Invention The following description focuses on embodiments of the invention applicable to a teletext service for a TV transmission. However, it will be appreciated that the invention is not limited to this application but may be applied to many other broadcast systems and embedded text services.
FIG. 1 illustrates a TV receiver 101 and a remote control 103 in accordance with some embodiments of the invention.
The TV receiver 101 receives TV programmes and presents them on a display as is well known in the art. Similarly, the remote control 103 may control the TV receiver 101 using infra red transmissions as is also well known in the art.
Specifically, the remote control 103 comprises a keyboard from which a user may control the TV receiver 101.
In addition, the remote control 103 of FIG. 1 comprises a display 107 on which text and graphical characters may be presented to a user. Furthermore, the TV receiver 101 comprises a teletext decoder which extracts teletext data from the received broadcast TV signal. The TV receiver 101 furthermore comprises a transmitter 109 which is arranged to transmit the teletext data over a second air interface, which in the example of FIG. 1 is a short range air interface. The remote control 103 comprises a receiver 111 * . . . I.e * I I * * . . I * . S * * S S S ** * S *II *** S * * I * S I * S S I S * S III S I which receives the teletext data transmitted over the short range air interface. The teletext data may then be presented to a user on the display 107 of the remote control 103.
Thus, the arrangement of FIG. 1 may allow for embedded text data from the TV broadcast signal to be displayed on a remote display which specifically may be part of the remote control for the TV receiver 101. This may, for example, allow a user to access teletext information while allowing an uninterrupted full screen display of the received TV programme on the display of the TV receiver 101.
Furthermore, the display of the remote control 103 may conveniently be read at a much closer distance and may use other display technologies that may provide an improved readability which may be particularly advantageous for vision impaired users.
FIG. 2 illustrates a more detailed arrangement of a content signal presentation apparatus 201 and remote terminal 203 in accordance with some embodiments of the invention. The content signal presentation apparatus 201 may specifically be a TV receiver and the remote terminal 203 may be a remote control as in the example of FIG. 1.
The content signal presentation apparatus 201 comprises a broadcast receiver 205 which receives a broadcast signal over a suitable broadcast interface. In the specific example, the broadcast receiver 205 may be a conventional analogue TV receiver receiving analogue TV signals broadcast by conventional terrestrial means.
* I * * S..
* S * * S * S I * S I * * S * S ** * S 155 **S S S I S * , S 0 0 5 S S * S *S S * The broadcast receiver 205 is coupled to a content signal processor 207. The content signal processor 207 is coupled to a display 209 of the content signal presentation apparatus 201 and is arranged to process the received broadcast signal in order to present it on the display 209.
Furthermore, the content signal processor 207 may control the operation of the broadcast receiver 205 and may in particular select a TV channel for viewing.
The content signal presentation apparatus 201 also comprises an infrared receiver 211 which may receive infrared signals from the remote terminal 203. These signals are fed to the content signal processor 207 which may control the operation of the content signal presentation apparatus 201 in response to the received signals. For example, the content signal processor 207 may switch the broadcast receiver 205 to a different channel, change the volume, adjust the display brightness etc. in response to signals from the remote terminal. Thus, in the example, the remote terminal 203 is a remote control for the content signal presentation apparatus 201.
The content signal presentation apparatus 201 further comprises an embedded text processor 213 which is arranged to extract text data from the broadcast content signal received by the broadcast receiver 205. In the specific example the embedded text processor 213 may comprise a teletext decoder which extracts teletext from a received TV signal.
The embedded text processor 213 furthermore comprises functionality for generating a second signal comprising text *1* * S t S S S * S * S * * * S * S ** * * S.. *** S S * * * :.. . data. In a low complexity embodiment, the embedded text processor 213 may simply generate the second signal as one comprising all the received embedded text data.
The embedded text processor 213 is coupled to a short range transmitter which transmits the second signal to the remote terminal 203 over a second air interface which is different than the broadcast air interface. Thus, the second air interface may use different channels, bandwidths, modulation schemes, transmit powers etc. Specifically, whereas the broadcast air interface is suitable for distribution of broadcast signals over typically large areas and distances, the second air interface is an air interface which is optimised for short range communication and may specifically be optimised for efficient point to point communication. In the specific example, the second air interface is specifically a Bluetooth'M air interface. The BluetoothTM air interface is designed for highly efficient short range point to point communication and is therefore particularly suitable for the current arrangement.
In many embodiments, the embedded text processor 213 may generate the second signal by including the embedded text data extracted from the broadcast signal together with text formatting data. The text formatting data may be part of the embedded text data or may be generated by the embedded text processor 213. As a specific example, the embedded text processor 213 may generate a text file for each received teletext page. The text file may include formatting text such as a colour or size of the font of different sections of the text. The content signal presentation apparatus 201 may then transmit the text file of a given teletext page to * S * . .t* * * S S S * S I I I I I * * * I S* * S *I *II S * S S * p 5 * S S S S * S III S S the remote terminal 203. The transmission of a teletext page may preferably be in a single data message but in some embodiments a plurality of data messages may be used.
The remote terminal 203 comprises a user input 217 which specifically may be a keypad as illustrated in the example of FIG. 1. The user input 217 is coupled to a remote control processor 219 which detects the user input and in response generates suitable control signals to be transmitted to the content signal presentation apparatus 201. In the example of FIG. 2, the remote control processor 219 is coupled to an infrared transmitter 221 which transmits the control signals to the infrared receiver 211 of the content signal presentation apparatus 201. In this way, the user input may be used to control the operation of the content signal presentation apparatus similarly to a conventional remote control.
The remote terminal 203 furthermore comprises a short range receiver 223 which receives the second signal transmitted from the content signal presentation apparatus 201 over the second air interface. Specifically, the short range receiver 223 may receive the data messages comprising teletext pages transmitted over a BluetoothTM air interface.
The short range receiver 223 is coupled to a text display processor 225 which is further coupled to a display 227. The text display processor 225 may select text data received by the short range receiver 223 and may control the display 227 to display the selected text. Thus, the display 227 of the remote terminal 203 may be used to present text data received by the content signal presentation apparatus 201 * S I S S..
* . I * * I I I * . S * S I I I SI * S *II III S S * * * * I * 5 0 I I * S III S I thereby providing an enhanced and/or improved user experience.
In some embodiments, the text display processor 225 may simply present the data from the content signal presentation apparatus 201 as and when it is received by the short range receiver 223.
As a specific example, the user input 217 may be used by a user to select a specific teletext page. The corresponding commands are generated and transmitted to the content signal presentation apparatus 201 by the infrared transmitter 221.
When the infrared receiver 211 receives these commands, the embedded text processor 213 is instructed to select the desired teletext page and to transmit this to the short range receiver 223in a data message. When received by the short range receiver 223, the teletext data is forwarded to the text display processor 225 which immediately changes the display 227 to show the new text page.
Thus, the embedded text processor 213 may be arranged to select a subset of text data in response to control data received by the infrared receiver 211.
Such an embodiment may allow for a low complexity remote terminal as much of the functionality for controlling, processing and selecting text data is comprised in the content signal presentation apparatus whereas the remote Lerinirial may effectively operate as a "dumb" display and control terminal.
* 0 S S S..
* . S S * S * S - . S S * S * * S 55 * S 555 *S* * S * S * I S S * 5 S S * S **S * I However, in other embodiments, the remote terminal may be a more complex terminal which comprises means for processing and manipulating text data. Specifically, the content signal presentation apparatus may e.g. comprise functionality for storing a plurality of teletext pages and for selecting a teletext page of the plurality of teletext pages for presentation.
For example, the remote terminal may comprise storage means which can store more text than can be displayed on the display. E.g. when the content signal presentation apparatus receives teletext data, this may be directly forwarded to the remote terminal. The remote terminal may then store some or all of the received teletext data. In this example, the remote terminal may comprise input means for controlling what teletext data is presented. For example, a remote control may comprise additional keys for navigating teletext and for selecting a specific page of teletext. When a specific page is selected the remote terminal may retrieve the desired teletext page from memory without any further interaction with the content signal presentation apparatus.
Such embodiments may allow for an improved user experience and may for example reduce the delay before a teletext page is displayed on the remote control.
It will be appreciated that in some embodiments, the text data transmitted over the second air interface comprises only the data related to the text data. For example, data messages comprising only the teletext data together with optional formatting data and overhead data may be transmitted to the remote terminal. This may allow for a reduction in the amount of data which is transmitted.
* * * * *** * . * * * * * I * . S * * 0 * S SI * e **I *S* 0 * * * 0 * I I I * S *SS * 0 However, in other embodiments further data may be included such as information indicating a current display status of the content signal presentation apparatus.
It will be appreciated that in some embodiments, the content signal presentation apparatus may also comprise functionality for presenting the embedded text data on a display of the content signal presentation apparatus. In such embodiments, the content signal presentation apparatus may comprise functionality for selecting between displaying the text on the display of the content signal presentatton apparatus and transmitting it to the remote terminal for display thereupon.
In some embodiments, the text data may be presented simultaneously on the display of the content signal presentation apparatus and on the display of the remote terminal. This may allow simple operation by a user while allowing the text data to be viewed at the content signal presentation apparatus or the remote terminal as desired by the user.
Furthermore, in some embodiments, the display of text on the content signal presentation apparatus and the remote terminal may be independent of each other. For example, the display of the content signal presentation apparatus may be selecLed to display one page of teletext whereas the display of the remote terminal may simultaneously display a different teletext page. This may for example allow two users to individually access different teletext pages simultaneously.
* . * * *** * * . S * * S * * S S * S S S S 55 * S *.S 55* S S S * * S S S S S S a * S *SS S S In some embodiments, the embedded text processor 213 may be capable of converting between a text data protocol used by the broadcast signal and a different text protocol used by the remote terminal. In a simple embodiment, the broadcast signal and the remote terminal may simply be arranged to use different text alphabets and the embedded text processor 213 may translate between these text alphabets. In more complex embodiments, the remote terminal may for example use an enhanced text protocol allowing for different fonts and formats and the embedded text processor 213 may convert the embedded text data to this enhanced text protocol. This translation may include adding additional information such as a selection of different fonts for different sections of a teletext page.
FIG. 3 illustrates a method of presenting text in accordance with some embodiments of the invention. The method may for example be applicable to the exemplary arrangements of FIG. 1 and FIG. 2.
The method initiates in step 301 wherein a content signal presentation apparatus receives a broadcast content signal.
The broadcast content signal comprises embedded text data which may for example be text based meta-data for the content of the broadcast signal.
Step 301 is followed by step 303 wherein text data is extracted from the broadcast content signal. The extracted text data may for example be a subset of the embedded text meta-data or may e.g. comprise all the embedded text data.
* . . . .,* * S * S * S I * * S S * * S S S ** * S 855 *S. S S S * * S * I S S S S * S **S S I Step 303 is followed by step 305 wherein a secondsignal comprising the text data is generated. For example, one or more data packets comprising all or some of the extracted text meta-data may be generated.
Step 305 is followed by step 307 wherein the second signal is transmitted to a remote terminal over a second air interface. For example, the data packets comprising all or some of the extracted text meta-data may be transmitted using an air interface having a significantly shorter range than the broadcast air interface. Specifically, a BluetoothTM or other short range radio air interface may be used.
Step 307 is followed by step 309 wherein the second signal is received at the remote terminal.
Step 309 is followed by step 311 wherein the text data is presented on a display of the remote terminal. For example a specific text element of the meta-data may be selected and displayed or all of the received meta- data text may be displayed.
It will be appreciated that the above description for clarity has described embodiments of the invention with reference to different functional units and processors.
However, it will be apparent that any suitable distribution of functionality between different functional units or processors may be used without detracting from the invention. For example, functionality illustrated to be performed by separate processors or controllers may be performed by the same processor or controllers. Hence, references to specific functional units are only to be seen * * * * .** * * . S S * S * S * * * . I S ** * * S.. *S* * S S S * S I S S S * S * S *S* * I as references to suitable means for providing the described functionality rather than indicative of a strict logical or physical structure or organization.
The invention can be implemented in any suitable form including hardware, software, firmware or any combination of these. The invention may optionally be implemented partly as computer software running on one or more data processors and/or digital signal processors. The elements and components of an embodiment of the invention may be physically, functionally and logically implemented in any suitable way. Indeed the functionality may be implemented in a single unit, in a plurality of units or as part of other functional units. As such, the invention may be implemented in a single unit or may be physically and functionally distributed between different units and processors.
Although the present invention has been described in connection with some embodiments, it is not intended to be limited to the specific form set forth herein. Rather, the scope of the present invention is limited only by the accompanying claims. Additionally, although a feature may appear to be described in connection with particular embodiments, one skilled in the art would recognize that various features of the described embodiments may be combined in accordance with the invention. In the claims, the term comprising does not exclude the presence of other elements or steps.
Furthermore, although individually listed, a plurality of means, elements or method steps may be implemented by e.g. a single unit or processor. Additionally, although individual * S * * *5.
* S * S S * S S * * 0 * * 0 * S OS * * S.. *I* S S S S O S S S S 5 5 S * 5.15 5 5 features may be included in different claims, these may possibly be advantageously combined, and the inclusion in different claims does not imply that a combination of features is not feasible and/or advantageous. Also the inclusion of a feature in one category of claims does not imply a limitation to this category but rather indicates that the feature is equally applicable to other claim categories as appropriate. Furthermore, the order of features in the claims do not imply any specific order in which the features must be worked and in particular the order of individual steps in a method claim does not imply that the steps must be performed in this order. Rather, the steps may be performed in any suitable order. In addition, singular references do not exclude a plurality. Thus references to "a", an", "first", second" etc do not preclude a plurality.

Claims (13)

* * * . *I* * S * * * S * S * * * . * * I S SI * S 555 *S* S * I * * I S S * S S S * S 555 S S CLAIMS
1. A content signal presentation apparatus comprising: means for receiving a broadcast content signal over a broadcast air interface, the broadcast content signal comprising embedded text data; means for extracting text data from the broadcast content signal; means for generating a second signal comprising the text data; and means for transmitting the second signal to a remote terminal over a second air interface.
2. The content signal presentation apparatus claimed in claim 1 wherein the second signal comprises only data related to the text data.
3. The content signal presentation apparatus claimed in any previous claim further comprising means for receiving control data from the remote terminal, and wherein the means for generating the second signal is operable to select a subset of the text data in response to the control data.
4. The content signal presentation apparatus claimed in any previous claim wherein the means for generating the second signal is arranged to convert between a text data protocol associated with the broadcast signal and a text data protocol associated with the remote terminal.
5. The content signal presentation apparatus claimed in any previous claim further comprising means for presenting * . a a as.
* . a S S S * S * I * * * I I S SI * I *SS SU* S S S * a. S I S S S S * . S.. I P the text data on a display of the content signal presentation apparatus.
6. The content signal presentation apparatus claimed in any previous claim further comprising means for selecting between presenting the text data on the display and transmitting it to the remote terminal.
7. The content signal presentation apparatus claimed in any previous claim wherein the second air interface is a short range air interface.
8. The content signal presentation apparatus claimed in claim 7 wherein the second air interface is a BluetoothTM air interface.
9. The content signal presentation apparatus claimed in any previous claim wherein the text data is teletext data.
10. The content signal presentation apparatus claimed in claim 9 wherein the means for extracting comprises a teletext decoder.
11. The content signal presentation apparatus claimed in any previous claim wherein the broadcast content signal is a television signal.
12. The content signal presentation apparatus claimed in any previous claim wherein the second air interface has a shorter range than the broadcast air interface.
* * I I *..
I I I I I I I
* I I S * I S IS * S *S III S S I * t, , * - . e * . S*S * * 13. The content signal presentation apparatus claimed in any previous claim wherein the embedded text data is meta- data associated with a content signal of the broadcast signal.
14. A remote control for a content signal presentation apparatus comprising means for transmitting control signals to the content signal presentation apparatus; means for receiving teletext data; a display; and means for presenting text of the teletext data on the display.
15. The remote control claimed in claim 14 further comprising means for storing a plurality of teletext pages.
16. The remote control claimed in claim 15 further comprising means for selecting a teletext page of the plurality of teletext pages and wherein the means for presenting text is operable to present the selected teletext page.
17. The remote control claimed in any of the claims 15 and 16 further comprising means for selecting between teletext pages wi.hout interfacing with the content signal presentation apparatus.
18. A method of presenting text comprising: receiving a broadcast content signal at a content signal presentation apparatus over a broadcast air a I I IS * , I I I * I * e I a S I S I I I 5I 1I I I I * a a a a * I I Ill I I interface, the broadcast content signal comprising embedded text data; extracting text data from the broadcast content signal; generating a second signal comprising the text data; transmitting the second signal to a remote terminal over a second air interface; receiving the second signal at the remote terminal; and presenting the text data on a display of the remote terminal.
Amendments to the claims have been flied as follows 1. A system including a content signal presentation apparatus and a remote terminal, the system comprising: means for receiving a broadcast content signal over a broadcast air interface, the broadcast content signal comprising embedded teletext data; means for extracting teletext data from the broadcast content signal; means for sending a control signal from the remote terminal to the content signal presentation apparatus, the control signal selecting a subset of the teletext data; means for generating a second signal comprising the subset of the stored teletext data; and means for transmitting the second signal to the remote terminal over a second air interface.
2. The system claimed in claim 1 wherein the subset of the teletext data is a specified teletext page to be transmitted to the remote terminal.
I C I ( C
C C C CC C C
C nrC nnpprn 3. The system claimed in any previous claim further comprising means for display for the content signal presentation apparatus, wherein the means for sending are operable to send a command from the remote terminal to the content signal presentation apparatus, the command directing the means for generating to select a first subset of the teletext data for the means for transmitting to send to the remote terminal and a second subset of the teletext data for simultaneously display on means for display for the content signal presentation apparatus.
4. The system claimed in any previous claim wherein the means for generating the second signal is arranged to convert between a teletext data protocol associated with the broadcast signal and a teletext data protocol associated with the remote terminal.
5. The system claimed in any previous claim wherein the content signal presentation apparatus further comprises means for presenting a subset of the teletext data on a display of the content signal presentation apparatus.
6. The system claimed in any previous claim wherein the content signal presentation apparatus further comprises means for selecting between presenting the teletext data on the display and transmitting it to the remote terminal.
7. The system claimed in any previous claim wherein the second air interface is a short range air interface.
8. The system claimed in claim 7 wherein the second air interface is a BluetoothTM air interface.
rrl0000rn t7J 9. The system claimed in claim 1 wherein the means for extracting comprises a teletext decoder.
10. The system claimed in any previous claim wherein the broadcast content signal is a television signal.
11. The system claimed in any previous claim wherein the second air interface has a shorter range than the broadcast air interface.
12. The system claimed in any previous claim wherein the embedded teletext data is meta-data associated with a content signal of the broadcast signal.
C C C
13. A method of presenting text comprising: receiving a broadcast content signal at a content signal presentation apparatus over a broadcast air interface, the broadcast content signal comprising embedded text data; extracting teletext data from the broadcast content signal; sending a control signal from a remote terminal selecting a subset of the teletext data; generating a second signal comprising the subset of the stored teletext data; transmitting the second signal to the remote terminal over a second air interface; receiving the second signal at the remote terminal; and presenting the subset of the stored teletext data on a display of the remote terminal.
(Il'QPP
GB0501615A 2005-01-28 2005-01-28 Teletext display on television remote control Withdrawn GB2423658A (en)

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