Image processing apparatus and method, and recording medium

• US 20020019988A1
• Filed: 05/18/2001
• Published: 02/14/2002
• Est. Priority Date: 05/25/2000
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Tamayama, Ken, Miyazaki, Shinichiro, Shirahama, Akira
• Granted Patent: US 7,123,305 B2
• Time in Patent Office: Days
• US Class Current: 725/139
• 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;

an extraction unit operable to extract the image data of a selected program from the acquired image data;

a first detection unit operable to detect transmission information of the selected program image data;

a second detection unit operable to detect a transmission error of the selected program image data; and

a setting unit operable to set a signal processing parameter for processing the selected program image data based on the transmission information and the transmission error.

2. An image processing apparatus according to claim 1, wherein:

the acquisition unit acquires the image data as a transport stream;

the extraction unit extracts the selected program image data from the transport stream;

the first detection unit acquires the transmission information from the transport stream; and

the second detection unit acquires the transmission error detected at the time of demodulating the input signal, the time of demultiplexing the transport stream, or the time of decoding a transport stream packet of the transport stream.

3. 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.

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

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

6. An image processing apparatus according to claim 1, further comprising a display operable to display the selected program image data after processing.

7. An image processing apparatus according to claim 6, wherein the display is processed based on the signal processing parameter.

8. An image processing apparatus according to claim 1, wherein the transmission information is a modulation system or a coding rate of the selected program image data.

9. An image processing method, comprising:

acquiring image data from an input signal;

extracting the image data of a selected program from the acquired image data;

detecting transmission information of the selected program image data;

detecting a transmission error of the selected program image data; and

setting a signal processing parameter for processing the selected program image data based on the transmission information and the transmission error.

10. An image processing method according to claim 9, wherein:

the acquiring step acquires the image data as a transport stream;

the extracting step extracts the selected program image data from the transport stream;

the step of detecting the transmission information includes acquiring the transmission information from the transport stream; and

the step of detecting the transmission error includes acquiring the transmission error detected at the time of demodulating the input signal, the time of demultiplexing the transport stream, or the time of decoding of a transport stream packet of the transport stream.

11. An image processing method according to claim 9, 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.

12. An image processing method according to claim 9, wherein the setting step includes setting the signal processing parameter based on an input from a user.

13. An image processing method according to claim 12, further comprising changing the signal processing parameter based on the input from the user.

14. An image processing method according to claim 9, further comprising processing the selected program image data in accordance with the set signal processing parameter.

15. An image processing method according to claim 14, further comprising displaying the processed selected program image data.

16. An image processing method according to claim 15, wherein the displaying step includes further processing the selected program image data based on the set signal processing parameter.

17. An image processing method according to claim 9, wherein the detected transmission information is a modulating system or a coding rate of the selected program image data.

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

acquiring image data;

extracting the image data of a selected program from the acquired image data;

detecting transmission information of the selected program image data;

detecting a transmission error of the selected program image data; and

setting a signal processing parameter for processing the selected program image data based on the transmission information and the transmission error.