Image processing apparatus and method, and recording medium

• US 7,123,305 B2
• Filed: 05/18/2001
• Issued: 10/17/2006
• Est. Priority Date: 05/25/2000
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Tamayama, Ken, Miyazaki, Shinichiro, Shirahama, Akira
• Primary Examiner(s): Lee, Michael H.
• Application Number:
  US09/861,124
• Publication Number:
  US 20020019988A1
• Time in Patent Office: 1,978 Days
• Field of Search: 348/607, 348/615, 348/571, 348/576, 348/466, 348/461, 348/465, 348473-475, 375/240.27, 375/240.26, 375/240.25, 375/240.24
• US Class Current: 348/466
• CPC Class Codes: H04H 40/18 Arrangements characterised by circuits or components specially adapted for receiving
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/42692 for reading from or writing on a volatile storage medium, e.g. Random Access Memory [RAM]
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/443 OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB

Abstract

Viewing of a program is enabled at optimum image quality. A correspondence table of an image signal processing parameter and a combination of TMCC information and transmission errors is stored in a RAM. A CPU reads out an image signal processing parameter corresponding to a combination of TMCC information supplied from an IF demodulator and transmission errors supplied from the IF demodulator, a demultiplexer and an MPEG video decoder from the correspondence table stored in the RAM, and controls signal processing in an image signal processing portion and display processing in an image display portion based on the image signal processing parameter.

Claims

1. An image processing apparatus, comprising:

an acquisition unit operable to acquire image data from an input signal and detect transmission information from the acquired image data;

a decoding unit operable to decode the acquired image data, and extract a transmission error; and

a setting unit operable to set a signal processing parameter based on the transmission information and the transmission error and to control processing of the acquired image data on the basis of the signal processing parameter to enable an image or images corresponding thereto to be displayed on the display with optimum quality,

in which the transmission information includes transmission mode information which is indicative of a modulation system, and in which the setting unit is operable to set the signal processing parameter in accordance with the transmission mode information and a number of transmission errors such that a first signal processing parameter having a first content is set when a first modulation system is utilized and there are few transmission errors, and such that a second signal processing parameter having a second content is set when a second modulation system different from the first modulation system is utilized and there are many transmission errors.

2. An image processing apparatus according to claim 1, further comprising a storage unit operable to store a correspondence table of the signal processing parameter and a combination of the transmission information and the transmission error,

wherein the setting unit reads out from the correspondence table the signal processing parameter corresponding to the combination of the transmission information and the transmission error and sets it.

3. An image processing apparatus according to claim 1, wherein the setting unit sets the signal processing parameter based on an input from a user.

4. An image processing apparatus according to claim 3, further comprising changing means for changing the signal processing parameter based on the input from the user.

10. An image processing apparatus according to claim 1, wherein the decoding unit is operable to output therefrom a luminance signal and a color difference signal, and further comprising a processing unit operable to receive the luminance signal and the color difference signal from the decoding unit and to generate an RGB (red green blue) signal therefrom.

5. An image processing method, comprising:

acquiring image data from an input signal;

detecting transmission information from the acquired image data;

decoding the acquired image data, and extracting a transmission error; and

setting a signal processing parameter based on the transmission information and the transmission error and controlling processing of the acquired image data on the basis of the signal processing parameter to enable an image or images corresponding thereto to be displayed on the display with optimum quality,

in which the transmission information includes transmission mode information which is indicative of a modulation system, and in which the signal parameter is set in accordance with the transmission mode information and a number of transmission errors such that a first signal processing parameter having a first content is set when a first modulation system is utilized and there are few transmission errors, and such that a second signal processing parameter having a second content is set when a second modulation system different from the first modulation system is utilized and there are many transmission errors.

6. An image processing method according to claim 5, further comprising storing a correspondence table of the signal processing parameter and a combination of the transmission information and the transmission error;

and

the setting step includes reading out from the correspondence table the signal processing parameter corresponding to the transmission information and the transmission error and setting the signal processing parameter read out.

7. An image processing method according to claim 5, wherein the setting step includes setting the signal processing parameter based on an input from a user.

8. An image processing method according to claim 7, further comprising changing the signal processing parameter based on the input from the user.

11. An image processing method according to claim 5, further comprising supplying a luminance signal and a color difference signal, and generating an RGB (red green blue) signal from the luminance signal and the color difference signal.

9. A recording medium recorded with a computer readable program for processing images, the program comprising:

acquiring image data;

detecting transmission information from the acquired image data;

decoding the acquired image data, and extracting a transmission error; and

setting a signal processing parameter based on the transmission information and the transmission error and controlling processing of the acquired image data on the basis of the signal processing parameter to enable an image or images corresponding thereto to be displayed on the display with optimum quality,

in which the transmission information includes transmission mode information which is indicative of a modulation system, and in which the signal parameter is set in accordance with the transmission mode information and a number of transmission errors such that a first signal processing parameter having a first content is set when a first modulation system is utilized and there are few transmission errors, and such that a second signal processing parameter having a second content is set when a second modulation system different from the first modulation system is utilized and there are many transmission errors.