DISPLAY DEVICE

• US 20180139502A1
• Filed: 06/09/2017
• Published: 05/17/2018
• Est. Priority Date: 11/11/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Sungeun, Jeong, Hyeryoung, Kim, Changhoe, Lee, Donghee, Choi, Woojin, Jung, Eunkyung, Kim, Hyokak, Kim, Changhoon
• Granted Patent: US 10,448,107 B2
• Time in Patent Office: Days
• CPC Class Codes: G06V 20/46 Extracting features or characteristics from the video content, e.g. video fingerprints, representative shots or key frames
• CPC Class Codes: G06V 20/635 Overlay text, e.g. embedded captions in a TV program
• CPC Class Codes: H04N 21/4383 Accessing a communication channel
• CPC Class Codes: H04N 21/44008 involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream arrangements characterised by components specially adapted for monitoring, identification or recognition of video in broadcast systems H04H60/59
• CPC Class Codes: H04N 21/44204 Monitoring of content usage, e.g. the number of times a movie has been viewed, copied or the amount which has been watched monitoring of user activities for profile generation for accessing a video database G06F16/739; protecting generic digital content where the protection is independent of the precise nature of the content G06F21/10; arrangements for monitoring the use made of the broadcast services in broadcast systems H04H60/31
• CPC Class Codes: H04N 21/454 Content or additional data filtering, e.g. blocking advertisements
• CPC Class Codes: H04N 21/4667 Processing of monitored end-user data, e.g. trend analysis based on the log file of viewer selections
• CPC Class Codes: H04N 21/4668 for recommending content, e.g. movies
• CPC Class Codes: H04N 21/4722 for requesting additional data associated with the content
• CPC Class Codes: H04N 21/4821 using a grid, e.g. sorted out by channel and broadcast time
• CPC Class Codes: H04N 21/6175 involving transmission via Internet broadcast-related systems characterised by the transmission system being the Internet H04H60/82
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/6582 Data stored in the client, e.g. viewing habits, hardware capabilities, credit card number arrangements where receivers interact with the broadcast H04H20/38
• CPC Class Codes: H04N 21/8133 specifically related to the content, e.g. biography of the actors in a movie, detailed information about an article seen in a video program

Abstract

A display device includes a display unit, an external device interface unit configured to receive an image signal from a set-top box connected to the display device, and a control unit configured to, if a broadcast channel is changed, display a broadcast image of the changed broadcast channel based on the image signal received from the set-top box, to recognize the channel number of the broadcast image by using the displayed broadcast image, and to display broadcasting information related to the recognized channel number on the display unit.

Claims

1. A display device comprising:

a display unit;

an external device interface unit configured to receive an image signal from a set-top box connected to the display device; and

a control unit configured to,

if a broadcast channel is changed, display a broadcast image of the changed broadcast channel based on the image signal received from the set-top box,

recognize the channel number of the broadcast image by using the displayed broadcast image, and

display broadcasting information related to the recognized channel number on the display unit.

2. The display device of claim 1, wherein the control unit acquires position information of the channel number included in the displayed broadcast image and recognizes the channel number based on the acquired position information.

3. The display device of claim 2, further comprising a storage unit configured to store the position information of the channel number.

4. The display device of claim 3, wherein, if the broadcast channel is changed again, the control unit recognizes a channel number of the changed broadcast channel by using the stored position information.

5. The display device of claim 3, wherein the control unit divides the displayed broadcast image into a plurality of regions, acquires the number of characters in the plurality of divided regions, recognizes a text in each region if the number of characters in each region is equal to or less than a reference number, registers the corresponding region as a candidate group if the recognized text is valid, acquires coordinates of the region registered as the candidate group, and acquires the acquired coordinates as the position information of the channel number.

6. The display device of claim 5, wherein, if the text in each region includes a number alone, the control unit determines that the recognized text is valid.

7. The display device of claim 6, wherein, if a plurality of candidate groups are registered, the control unit filters the plurality of candidate groups based on information of each candidate group, and if one candidate group remains as a result of the filtering, the control unit acquires coordinates of the remaining candidate group as the position of the channel number.

8. The display device of claim 7, wherein the information of each candidate group includes one or more of coordinate information of each candidate group, a length of a text included in each candidate group, and a text size.

9. The display device of claim 8, wherein the control unit selects a candidate group having a largest text size as a final candidate group among the plurality of registered candidate groups, and acquires coordinates of the selected final candidate group as the position information of the channel number.

10. The display device of claim 1, wherein the control unit displays the broadcasting information related to the recognized channel number by using electronic program guide (EPG) information received from the set-top box, and the broadcasting information includes one or more of a channel recommendation, information on the broadcast image, and a genre of the broadcast image.

11. A display device comprising:

a display unit;

an external device interface unit configured to receive a broadcast image from a set-top box connected to the display device;

a storage unit configured to store position information of a channel number corresponding to the set-top box; and

a control unit configured to;

if a broadcast channel is changed, recognize the channel number based on the stored position information of the channel number, and

display broadcasting information related to the recognized channel number on the display unit.

12. The display device of claim 11, further comprising a network interface unit for network connection to a server,

wherein the control unit acquires the position information of the channel number corresponding to the set-top box from the server connected through the network interface unit, and stores the received position information of the channel number in the storage unit.

13. The display device of claim 12, wherein the control unit acquires a database including the position information of the channel number from the server, and the database includes a correspondence relationship between the position information of the channel number, a type of the set-top box, and a version of the set-top box.

14. The display device of claim 13, wherein, if a new model of a set-top box is connected to the display device, the control unit recognizes a channel number of a broadcast image input from the new model of the set-top box by using the database.

15. The display device of claim 13, wherein, if a new version of a set-top box is connected to the display device, the control unit recognizes a channel number of a broadcast image input from the new version of the set-top box by using the database.

16. The display device of claim 12, wherein the control unit acquires the channel number of the broadcast image based on the broadcast image if the channel number is not recognized based on the stored position information of the channel number, and transmits, to the server, the acquired channel number and identification information of the set-top box currently connected to the display device.

17. The display device of claim 16, wherein the control unit divides the displayed broadcast image into a plurality of regions, acquires the number of characters in the plurality of divided regions, recognizes a text in each region if the number of characters in each region is equal to or less than a reference number, registers the corresponding region as a candidate group if the recognized text is valid, acquires coordinates of the region registered as the candidate group, and acquires the acquired coordinates as the position information of the channel number.

18. The display device of claim 17, wherein, if a plurality of candidate groups are registered, the control unit filters the plurality of candidate groups based on information of each candidate group, and if one candidate group remains as a result of the filtering, the control unit acquires coordinates of the remaining candidate group as the position of the channel number, and

the information of each candidate group includes one or more of coordinate information of each candidate group, a length of a text included in each candidate group, and a size of the text.

19. The display device of claim 18, wherein the control unit displays a broadcast icon for providing broadcasting information related to the recognized channel number by using electronic program guide (EPG) information received from the set-top box.

20. The display device of claim 11, wherein the control unit displays the broadcasting information related to the recognized channel number by using electronic program guide (EPG) information received from the set-top box, and the broadcasting information includes one or more of a channel recommendation, information on the broadcast image, and a genre of the broadcast image.