Image processing apparatus capable of interpolating error data

Claim 2

An image processing apparatus comprising: input means for inputting an image signal divided into a plurality of different subband components; error detection means for detecting an error in low-frequency subband component data of the image signal of one picture; and interpolation means for interpolating remaining frequency subband component data other than the low-frequency subband component of said one picture in accordance with an error detection result of said error detection means.

Claim 3

An apparatus according to claim 1 , wherein said interpolation means interpolates said remaining frequency subband component data by using a predetermined coefficient.

Claim 4

An apparatus according to claim 2 , wherein said interpolation means interpolates said remaining frequency subband component data by calculating said remaining frequency subband component data and the predetermined coefficient.

Claim 5

An apparatus according to claim 3 , wherein the predetermined coefficient has a value different for each of the remaining frequency subband components.

Claim 6

An apparatus according to claim 3 , wherein said interpolation means interpolates said remaining frequency subband component data by multiplying said remaining frequency subband component data by the predetermined coefficient.

Claim 7

An apparatus according to claim 1 , wherein said interpolation means interpolates all remaining frequency subband component data of one picture.

Claim 8

An apparatus according to claim 1 , wherein said error detection means further detects an error in said remaining frequency subband component data, and said interpolation means replaces said remaining frequency subband component data with a predetermined value in accordance with an error detection result of said remaining frequency subband component data.

Claim 9

An apparatus according to claim 1 , wherein said interpolation means further interpolates the low-frequency subband component data in accordance with the error detection result of said error detection means.

Claim 10

An apparatus according to claim 8 , wherein said interpolation means interpolates the low-frequency subband component data by replacing the low-frequency subband component data with a predetermined value.

Claim 11

An apparatus according to claim 8 , wherein said interpolation means replaces all low-frequency subband component data of said one picture with a predetermined value.

Claim 12

An apparatus according to claim 8 , wherein said interpolation means interpolates the detected error by using low-frequency subband component data of frames adjacent to a frame containing the error.

Claim 13

An apparatus according to claim 11 , wherein said interpolation means calculates an average of low-frequency subband component data of two adjacent frames before and after the frame containing the error, and replaces the detected error with the average.

Claim 14

An apparatus according to claim 1 , wherein the plurality of subband components include subband components in horizontal and vertical directions of the picture.

Claim 15

An image processing apparatus comprising: input means for inputting an image signal divided into a plurality of different subband components; first error detection means for detecting an error in remaining frequency subband component data other than low-frequency subband component data of the image signal of one picture; selection means for selecting and outputting one of said remaining frequency subband component data and a predetermined value in accordance with an output from said first error detection means; second error detection means for detecting an error in the low-frequency subband component data of said one picture; and interpolation means for interpolating the low-frequency subband component data in accordance with detection of the error by said second error detection means, and transforming an output from said selection means into remaining data.

Claim 16

An image processing apparatus comprising: input means for inputting an image signal divided into a plurality of different subband components; first error detection means for detecting an error in remaining frequency subband component data other than low-frequency subband component data of the image signal of one picture; selection means for selecting and outputting one of said remaining frequency subband component data and a predetermined value in accordance with an output from said first error detection means; second error detection means for detecting an error in the low-frequency subband component data of said one picture; and interpolation means for interpolating the low-frequency subband component data in accordance with detection of the error by said second error detection means, and transforming an output from said selection means into remaining data.

Claim 17

An image processing method comprising: an input step of inputting an image signal divided into a plurality of different subband components; an error detection step of detecting an error in low-frequency subband component data of the image signal of one picture; and an interpolation step of interpolating remaining frequency subband component data other than the low-frequency subband component of said one picture in accordance with an error detection result in said error detection step.

Claim 18

An image processing method comprising: an input step of inputting an image signal divided into a plurality of different subband components; an error detection step of detecting an error in low-frequency subband component data of the image signal of one picture; and an interpolation step of interpolating remaining frequency subband component data other than the low-frequency subband component of said one picture in accordance with an error detection result in said error detection step.

Claim 19

A method according to claim 15 , wherein said interpolation step interpolates said remaining frequency subband component data by using a predetermined coefficient.

Claim 20

A method according to claim 16 , wherein said interpolation step interpolates said remaining frequency subband component data by calculating said remaining frequency subband component data and the predetermined coefficient.

Claim 21

A method according to claim 17 , wherein the predetermined coefficient has a value different for each of the remaining frequency subband components.

Claim 22

A method according to claim 17 , wherein said interpolation step interpolates said remaining frequency subband component data by multiplying said remaining frequency subband component data by the predetermined coefficient.

Claim 23

A method according to claim 15 , wherein said interpolation step interpolates all remaining frequency subband component data of one picture.

Claim 24

A method according to claim 15 , wherein said error detection step further detects an error in said remaining frequency subband component data, and said interpolation step replaces said remaining frequency subband component data with a predetermined value in accordance with an error detection result of said remaining frequency subband component data.

Claim 25

A method according to claim 15 , wherein said interpolation step further interpolates the low-frequency subband component data in accordance with the error detection result in said error detection step.

Claim 26

A method according to claim 22 , wherein said interpolation step interpolates the low-frequency subband component data by replacing the low-frequency subband component data with a predetermined value.

Claim 27

A method according to claim 23 , wherein said interpolation step replaces all low-frequency subband component data of said one picture with a predetermined value.

Claim 28

A method according to claim 23 , wherein said interpolation step interpolates the detected error by using low-frequency subband component data of frames adjacent to a frame containing the error.

Claim 29

A method according to claim 25 , wherein said interpolation step calculates an average of low-frequency subband component data of two adjacent frames before and after the frame containing the error, and replaces the detected error with the average.

Claim 30

A method according to claim 15 , wherein the plurality of subband components include subband components in horizontal and vertical directions of the picture.

Claim 31

An image processing method comprising: an input step of inputting an image signal divided into a plurality of different subband components; a first error detection step of detecting an error in remaining frequency subband component data other than low-frequency subband component data of the image signal of one picture; a selection step of selecting and outputting one of said remaining frequency subband component data and a predetermined value in accordance with an output of said first error detection step; a second error detection step of detecting an error in the low-frequency subband component data of said one picture; and an interpolation step of interpolating the low-frequency subband component data in accordance with detection of the error in said second error detection step, and transforming an output of said selection step into remaining data.

Claim 32

An image processing method comprising: an input step of inputting an image signal divided into a plurality of different subband components; a first error detection step of detecting an error in remaining frequency subband component data other than low-frequency subband component data of the image signal of one picture; a selection step of selecting and outputting one of said remaining frequency subband component data and a predetermined value in accordance with an output of said first error detection step; a second error detection step of detecting an error in the low-frequency subband component data of said one picture; and an interpolation step of interpolating the low-frequency subband component data in accordance with detection of the error in said second error detection step, and transforming an output of said selection step into remaining data.