摘要:
The present invention relates to a data processing apparatus. Additional information is embedded in coded data obtained by encoding image data, without increasing the amount of the coded data, and the data in which the additional information is embedded is correctly decoded into the image data and the additional information. An embedded compression encoder 11 encodes image data according to a predetermined coding rule, and destroys the coding rule based on additional information, thereby embedding the additional information. A decoder 12 restores the embedded coded data, obtained by embedding the additional information in the coded data, into the coded data encoded according to the coding rule, thereby decoding the additional information and also decoding the coded data into the image data.
摘要:
Virtual pixels (indicated by ○ in the figure) are assumed to exist near SD pixels (indicated by ○ in the figure) constituting an SD picture obtained by thinning an HD picture. The pixel values of the pixels are found from the HD picture, and a part of the pixel value of the virtual pixels is laid out in place of a part of the pixel value of the SD pixels. One of the SD pixels is used as a notable pixel, and a prediction tap is formed from the SD pixels and the virtual pixels on the periphery of the notable pixel. By linear combination of the prediction tap and a predetermined prediction coefficient, adaptive processing for finding a predicted value of the HD picture is carried out. In addition, a prediction error of the predicted value found by adaptive processing with respect to the HD picture is calculated, and the pixel value of the notable pixel is corrected in accordance with the prediction error. Thus, a decoded picture more proximate to an original picture may be provided without deteriorating the coding efficiency.
摘要:
This invention relates to an apparatus for processing an information signal etc. that, when converting, for example, SD signal into HD signal, enables well to be obtained pixel data of HD signal no matter whether the dynamic range DR is large or small. DR in a class tap is detected. If DR≥Th, items of pixel data Y 1-a ―Y 4-a calculated by using item of coefficient data W i-a corresponding to a class code Ca are estimated as items of pixel data of HD signal. If DR 1-a ― y 4-a y 1-b ―y 4-b calculated by using items of coefficient data W i-a , W i-b corresponding to class codes Ca, Cb is estimated as item of the pixel data of HD signal. The items of coefficient data Wi-a, Wi-b are obtained by learning between a student signal corresponding to the SD signal and a teacher signal corresponding to the HD signal by using a portion of the DR having a value thereof that is not less than the threshold value Th. The code Ca is converted into the code Cb so that the addition mean value can most approach a true value of the pixel data of the HD signal.
摘要:
An interlaced input picture signal having a field frequency of 50 Hz is supplied. A class detecting circuit detects a class corresponding to a pattern of a level distribution of input pixels in the vicinity of an output pixel to be generated. A predictive coefficient set corresponding to the class is read from a predictive coefficient memory. Sum-of-product calculating circuits calculate data of an output picture signal using a linear estimating expression of predictive taps (pixels of an input picture signal) and predictive coefficient sets. The sum-of-product calculating circuits output pixel values M and S of an output picture signal having a field frequency of 50 Hz. The pixel values M and S that are output from the sum-of-product calculating circuits are converted into a signal having a frequency of 60 Hz by respective field memories. A selector alternately selects outputs of the field memories and generates an output picture signal (having a field frequency of 60 Hz).
摘要:
An image signal generated by a CCD image sensor is processed by the block-generating section 28 provided in an image-signal processing section 25. A class tap and a prediction tap are thereby extracted. The class tap is output to an ADRC process section 29, and the prediction tap is output to an adaptation process section 31. The ADRC process section 29 performs an ADRC process on the input image signal, generating characteristic data. A classification process section 30 generates a class code corresponding to the characteristic data thus generated and supplies the same to an adaptation process section 31. The adaptation process section 31 reads, from a coefficient memory 32, the set of prediction coefficients which corresponds to the class code. The set of prediction coefficients and the prediction tap are applied, thereby generating all color signals, i.e., R, G and B signals, at the positions of the pixels which are to be processed.