Source: http://www.google.com/patents/US7206025?dq=5179747
Timestamp: 2014-07-12 08:10:21
Document Index: 313523999

Matched Legal Cases: ['art 102', 'art 105', 'art 103', 'art 104', 'art 105', 'art 202', 'art 204', 'art 204', 'art 206', 'art 204', 'art 204']

Patent US7206025 - Device and method for converting format in digital TV receiver - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsDevice and method for converting a format of a video signal in a digital TV receiver is provided. Format conversion can be carried out at one chip of a format converting device, inclusive of conversion of resolution, frame rate, scanning method, aspect ratio, color space, chroma format, and gamma correction....http://www.google.com/patents/US7206025?utm_source=gb-gplus-sharePatent US7206025 - Device and method for converting format in digital TV receiverAdvanced Patent SearchPublication numberUS7206025 B2Publication typeGrantApplication numberUS 09/814,858Publication dateApr 17, 2007Filing dateMar 23, 2001Priority dateMar 24, 2000Fee statusPaidAlso published asUS20030206242Publication number09814858, 814858, US 7206025 B2, US 7206025B2, US-B2-7206025, US7206025 B2, US7206025B2InventorsSeung Jong ChoiOriginal AssigneeLg Electronics Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (33), Referenced by (43), Classifications (30), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetDevice and method for converting format in digital TV receiverUS 7206025 B2Abstract Device and method for converting a format of a video signal in a digital TV receiver is provided. Format conversion can be carried out at one chip of a format converting device, inclusive of conversion of resolution, frame rate, scanning method, aspect ratio, color space, chroma format, and gamma correction. Therefore, the digital TV receiver is made to convert a wide range of video signals inclusive of, not only a digital TV broadcasting signal, but also analog TV broadcasting signal, and computer video signal, at one chip of system block. Moreover, the digital TV receiver is made to provide a variety of standards of format converted video signals, not only to the connected display, but also to other general video signal processing devices.
For an example, upon reception of an NTSC TV broadcasting composite video signal, an NTSC decoder 101 separates a horizontal synchronizing signal and a vertical synchronizing signal, and a luminance signal �Y� and a color signal �C� therefrom. If necessary, a color converting part 102 makes a color space conversion (for an example, YIQ→YCbCr) and a chroma format conversion (for an example, 4:2:0→4:2:2) of the input video signal, and forwards the result to the format converting part 105. By the way, the VGA and SVGA and the like, computer video signals, are provided to the digital TV receiver through an RGB input part 103 in forms of RGB, when a color converting part 104 makes a color space conversion (for an example, RGB→YCbCr) and a chroma format conversion (for an example, 4:4:4→4:2:2) of the input video signal, and forwards the result to the format converting part 105.
SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a chip device and method for converting a format of a video signal in a digital TV receiver that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. FIG. 2 illustrates a block diagram showing concept of a format converting device in a digital TV receiver in accordance with a preferred embodiment of the present invention, wherein various input signals are converted into video signals of desired formats at a format converting device 200 integrated into one chip. FIG. 3 illustrates a block diagram showing a detailed system of the format converting device 200 in a digital TV receiver in accordance with a preferred embodiment of the present invention.
For converting the format of the received video signal provided from the video signal format detecting part 202, the format converting part 204 carries out seven format converting steps, and stores a format converted video signal at the memory 207 (step 407). That is, the format converting part 204 carries out format conversions of the spatial resolution, the frame rate, the scanning method, the aspect ratio, the color space, and the chroma format, and the gamma correction of the received video signal. As the gamma correction changes a luminance �Y� of the received video signal, the gamma correction is also taken as a format conversion. Although the gamma correction is required when the display is a digital TV receiver, the same is not required when the display is a personal computer.
[ R G B ] = [ 256 - 86 - 179 256 443 0 256 0 350 ] ⁡ [ Y Cb - 128 Cr - 128 ] R = 256 * Y - 86 ⁢ ⁢ ( Cb - 128 ) - 179 ⁢ ⁢ ( Cr - 128 ) G = 256 * Y + 443 ⁢ ⁢ ( Cb - 128 ) B = 256 * Y350 ⁢ ⁢ ( Cr - 128 ) ( 1 ) As explained, if the user desired output format is the compressed bitstream, the video encoder 205 reads the format converted video signal stored in the memory 207 at first. Then, after compressing the format converted video signal, the compressed video signal is stored in the memory 207, again. The video signal forwarding part 206 reads the video signal converted to the desired output standard from the memory 207 and forwards it through the interface part (not shown). For an example, assume that the received video signal is the computer video signal, the color space is a RGB form, and the chroma format is in a 4:4:4 form. For displaying the received computer video signal on the digital TV receiver, the format converting part 204 converts the resolution, the frame rate, the scanning method, and the aspect ratio of the received video signal consistent with the desired output format. Moreover, the format converting part 204 converts the color space of the RGB form into YCbCr form, and chroma format of the 4:4:4 form into 4:2:0 form. As explained, if necessary, the gamma correction can be carried out as a part of the format conversion.
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2013Samsung Electronics Co., Ltd.Display apparatus having display driving unit on lower part* Cited by examinerClassifications U.S. Classification348/441, 348/554, 348/556, 348/555, 348/455, 348/459, 348/454, 348/E09.039, 348/558, 348/443, 348/E07.003, 348/557, 348/705, 348/E11.021, 348/450International ClassificationH04N3/27, H04N7/01, H04N9/64, G09G5/00, H04N5/268, H04N11/20, H04N5/46Cooperative ClassificationG09G5/006, H04N11/20, H04N9/641, H04N7/01European ClassificationH04N11/20, H04N9/64A, H04N7/01, G09G5/00T4Legal EventsDateCodeEventDescriptionSep 20, 2010FPAYFee paymentYear of fee payment: 4Feb 19, 2008CCCertificate of correctionMar 23, 2001ASAssignmentOwner name: LG ELECTRONICS, INC., KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHOI, SEUNG JONG;REEL/FRAME:011633/0429Effective date: 20010312RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by 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