Television Transmission system using transmission of basic picture weighting factors
First Claim
1. A television transmission system for transmitting a picture represented by a digital picture signal from an encoding station to a decoding station, the encoding station being adapted to partition the picture into sub-pictures of N1 ×
- N2 pixels each for performing a forward transform for generating basic picture weighting factors, the decoding station being adapted to perform an inverse transform for generating a local sub-picture consisting of N1 ×
N2 pixels, characterized in thatfor the forward transform(i) each sub-picture is multiplied by a reference picture having different values for different pixels, so that each time a product sub-picture is obtained;
(ii) each product sub-picture is multiplied by a number of kernel pictures for generating a number of blocks of product element values corresponding to the number of kernel pictures, each kernel picture being equal to the product of the reference picture and a basic picture from a collection of basic pictures each being formed by an orthogonal polynomial associated with the square value of the reference picture;
(iii) all product element values of a block are added together for generating a weighting factor;
for the inverse transform(iv) each weighting factor is multiplied by a kernel picture for generating a number of auxiliary sub-pictures;
(v) the auxiliary sub-pictures thus obtained are added together.
1 Assignment
0 Petitions
Accused Products
Abstract
In a television transmission system for digital picture signals each picture is partitioned into sub-pictures of N1 ×N2 pixels for limiting the bit rate. Each sub-picture is subjected to a forward picture transform for generating basic picture weighting factors. To this end each sub-picture is multiplied by a reference picture which has different values for different pixels (for example, as described by a Gauss function). This multiplied sub-picture is subsequently multiplied by a number of kernel pictures so that the said basic picture weighting factors are obtained. Each kernel picture is equal to the product of the reference picture and a basic picture. Of the collection of basic pictures each basic picture is an orthogonal polynomial associated with the square value of the reference picture. For regaining the original sub-pictures each weighting factor is multiplied by the original kernel picture from which the weighting factor is obtained. Each weighting factor of a sub-picture thus supplies an auxiliary sub-picture. Summation of all auxiliary sub-pictures yields a replica of the original sub-picture.
5 Citations
10 Claims
-
1. A television transmission system for transmitting a picture represented by a digital picture signal from an encoding station to a decoding station, the encoding station being adapted to partition the picture into sub-pictures of N1 ×
- N2 pixels each for performing a forward transform for generating basic picture weighting factors, the decoding station being adapted to perform an inverse transform for generating a local sub-picture consisting of N1 ×
N2 pixels, characterized in thatfor the forward transform (i) each sub-picture is multiplied by a reference picture having different values for different pixels, so that each time a product sub-picture is obtained; (ii) each product sub-picture is multiplied by a number of kernel pictures for generating a number of blocks of product element values corresponding to the number of kernel pictures, each kernel picture being equal to the product of the reference picture and a basic picture from a collection of basic pictures each being formed by an orthogonal polynomial associated with the square value of the reference picture; (iii) all product element values of a block are added together for generating a weighting factor; for the inverse transform (iv) each weighting factor is multiplied by a kernel picture for generating a number of auxiliary sub-pictures; (v) the auxiliary sub-pictures thus obtained are added together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- N2 pixels each for performing a forward transform for generating basic picture weighting factors, the decoding station being adapted to perform an inverse transform for generating a local sub-picture consisting of N1 ×
Specification