Apparatus for processing image signal and method thereof

• US 7,224,402 B2
• Filed: 09/06/2002
• Issued: 05/29/2007
• Est. Priority Date: 10/24/2001
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Sung-hun
• Primary Examiner(s): Kostak; Victor R.
• Application Number:
  US10/235,793
• Publication Number:
  US 20030076446A1
• Time in Patent Office: 1,726 Days
• Field of Search: 348/558, 348/554, 348/556, 348/555, 348/441, 348/458, 348/625, 348/705, 348/706, 710/16, 710/62, 710/18
• US Class Current: 348/558
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: H04N 21/440218 by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 conversion of standards in analogue television systems H04N7/01
• CPC Class Codes: H04N 5/21 Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
• CPC Class Codes: H04N 5/46 for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27
• CPC Class Codes: H04N 5/57 Control of contrast or brightness
• CPC Class Codes: H04N 7/0135 involving interpolation processes interpolation-based image scaling G06T3/4007; interpolation for video coding H04N19/587, H04N19/59

Abstract

An image signal processing apparatus and method is capable of variably performing format conversion and image quality improvement according to a kind of an inputted image signal. A detecting section detects a kind of image signal inputted from an external device. A control section controls the format of the image signal to be converted by selecting the format converting coefficient from the first storing section in accordance with the kind of the image signal. A format converting section converts a format of the inputted video signal by the selected format converting coefficient. The control section selects an image quality improving converting coefficient corresponding to the video signal from the second storing section. The image quality improving section improves a quality of the video signal converted by the selected image quality improving converting coefficient. By varying the format converting coefficient and image quality improving converting coefficient according to the kind of the image signal, it is possible to perform the format conversion and image quality improvement suitable for the kind of the inputted image signal.

Claims

1. An apparatus for processing an image signal, comprising:

a detecting section for inputting an image signal through one of different input terminals according to a kind of an external device and detecting a kind of the input image signal by distinguishing the input terminal;

a first storing section for storing a plurality of format converting coefficients;

a format converting section for converting a format of the image signal by use of the format converting coefficient corresponding to the kind of the image signal;

a control section for transmitting to the format converting section the format converting coefficient selected from the first storing section in accordance with the kind of the image signal, and controlling the format converting section to convert the format of the image signal by using the transmitted format converting coefficient;

a second storing section for storing a plurality of image quality improving converting coefficients; and

an image quality improving section for improving a quality of the image signal by the image quality improving converting coefficient corresponding to the kind of the image signal,

the control section, being inputted with the image signal of converted format, for transmitting to the image quality improving section the image quality improving converting coefficient selected from the second storing section, and controlling the image quality improving section to improve the image quality of the image signal by using the transmitted image quality improving converting coefficient.

2. A method for processing an image signal, the method comprising the steps of:

inputting an image signal through one of different input terminals according to a kind of an external device and detecting a kind of the input image signal by distinguishing the input terminal;

selecting a format converting coefficient corresponding to the kind of the image signal;

converting a format of the image signal by the format converting coefficient;

selecting an image quality improving converting coefficient corresponding to the kind of the image signal; and

improving a quality of the converted image signal by the selected image quality improving converting coefficient.

3. An apparatus for processing an image signal, the apparatus comprising:

an input section for receiving a kind of an external device from a user;

a first storing section for storing a plurality of format converting coefficients;

a format converting section for converting a format of the image signal by use of the format converting coefficient corresponding to a kind of the image signal inputted through one of different input terminals according to a kind of an external device and detected by distinguishing the input terminal;

a control section for transmitting to the format converting section the format converting coefficient selected from the first storing section in accordance with the kind of the image signal, and controlling the format converting section to convert the format of the image signal by using the transmitted format converting coefficient;

a second storing section for storing a plurality of image quality improving converting coefficients; and

an image quality improving section for improving a quality of the image signal by the image quality improving converting coefficient corresponding to the image signal inputted from the external device,

the control section for transmitting to the image quality improving section the image quality improving converting coefficient selected from the second storing section in accordance with the external device, and controlling to improve the image quality of the converted image signal by using the transmitted image quality improving converting coefficient.

4. A method of processing an image signal, the method comprising the steps of:

receiving a kind of an external device from a user;

selecting a format converting coefficient corresponding to the kind of the image signal inputted through one of different input terminals according to a kind of an external device and detected by distinguishing the input terminal;

converting a format of the image signal by the format converting coefficient;

selecting an image quality improving converting coefficient corresponding to the kind of the external device; and

improving a quality of the converted image signal by the image quality improving converting coefficient.