Method and arrangement for coding and decoding a digitized image

Claim 3

The method according to claim 1 , wherein a variant of a shape-adapted discrete cosine transformation is used as a first shape-adapted transformation coding, and wherein a shape-adapted discrete cosine transformation is used as a second shape-adapted transformation coding.

Claim 4

The method according to claim 1 , wherein at least one of the first shape-adapted transformation coding and the second shape-adapted transformation coding takes place such that a signal energy of the image points to be transformed in a spatial domain is approximately equal to a signal energy of the transformed image points in the frequency domain.

Claim 7

The method according to claim 1 , wherein the first shape-adapted transformation coding is applied only to edge image blocks.

Claim 10

The method according to claim 6 , wherein a variant of a shape-adapted inverse discrete cosine transformation is used as a first inverse shape-adapted transformation coding, and wherein an inverse shape-adapted discrete cosine transformation is used as a second inverse shape-adapted transformation coding.

Claim 11

The method according to claim 6 , wherein at least one of the first inverse shape-adapted transformation coding and the second inverse shape-adapted transformation coding takes place such that a signal energy of the image points to be transformed in a spatial domain is approximately equal to a signal energy of the transformed image points in the frequency domain.

Claim 14

The method according to claim 6 , wherein the first inverse shape-adapted transformation coding is applied only to edge image blocks.

Claim 15

An arrangement for coding a digitized image having image objects with a number of image points, comprising: device for receiving image point of the digitized image; and a processor unit connected to said device and structured such that the image coding takes place in one of an intra-image coding mode or in an inter-image coding mode, in the intra-image coding mode the image information of the image points is transformed, in the inter-image coding mode difference image information of image information of two successive images is transformed, in the inter-image coding mode a first shape-adapted transformation coding is carried out, and in the intra-image coding mode a second shape-adapted transformation coding, different from the first shape-adapted transformation coding, is carried out.

Claim 16

An arrangement for coding a digitized image having image objects with a number of image points, comprising: device for receiving image point of the digitized image; and a processor unit connected to said device and structured such that the image coding takes place in one of an intra-image coding mode or in an inter-image coding mode, in the intra-image coding mode the image information of the image points is transformed, in the inter-image coding mode difference image information of image information of two successive images is transformed, in the inter-image coding mode a first shape-adapted transformation coding is carried out, and in the intra-image coding mode a second shape-adapted transformation coding, different from the first shape-adapted transformation coding, is carried out.

Claim 17

The arrangement according to claim 11 , wherein the processor unit is structured such that a variant of a shape-adapted discrete cosine transformation is used as a first shape-adapted transformation coding, and a shape-adapted discrete cosine transformation is used as a second shape-adapted transformation coding.

Claim 18

The arrangement according to claim 11 , wherein the processor unit is structured such that at least one of the first shape-adapted transformation coding and the second shape-adapted transformation coding takes place such that a signal energy of the image points to be transformed in a spatial domain is approximately equal to a signal energy of transformed image points in a frequency domain.

Claim 19

A arrangement for coding a digitized image having image objects with a number of image points, comprising: device for receiving image point of the digitized image; and a processor unit connected to said device and structured such that the image coding takes place in one of an intra-image coding mode or in an inter-image coding mode, in the intra-image coding mode the image information of the image points is transformed, in the inter-image coding mode difference image information of image information of two successive images is transformed, in the inter-image coding mode a first shape-adapted transformation coding is carried out, and in the intra-image coding mode a second shape-adapted transformation coding, different from the first shape-adapted transformation coding, is carried out; wherein the processor unit is set up such that transformation coefficients c j of the image points x j transformed according to the first shape-adapted transformation coding are formed according to the following rule: c j =((2 /N )) DCT−N ( p,k )· x j , whereby N designates a size of an image vector to be transformed in which the transformed image points are contained, DCT−N designates a transformation matrix of size N×N, p, k designate indices, with p, k ε(0, N−1).

Claim 20

A arrangement for coding a digitized image having image objects with a number of image points, comprising: device for receiving image point of the digitized image; and a processor unit connected to said device and structured such that the image coding takes place in one of an intra-image coding mode or in an inter-image coding mode, in the intra-image coding mode the image information of the image points is transformed, in the inter-image coding mode difference image information of image information of two successive images is transformed, in the inter-image coding mode a first shape-adapted transformation coding is carried out, and in the intra-image coding mode a second shape-adapted transformation coding, different from the first shape-adapted transformation coding, is carried out; wherein the processor unit is set up such that transformation coefficients c j of the image points x j transformed according to the first shape-adapted transformation coding are formed according to the following rule: c j =((2 /N )) DCT−N ( p,k )· x j , whereby N designates a size of an image vector to be transformed in which the transformed image points are contained, DCT−N designates a transformation matrix of size N×N, p, k designate indices, with p, k ε(0, N−1).

Claim 21

The arrangement according to claim 11 , wherein the processor unit is structured such that the first shape-adapted transformation coding is applied only to edge image blocks.

Claim 22

An arrangement for decoding a digitized image having image objects having an arbitrary number of image points, comprising: device for receiving image points of the digitized image; and a processor unit connected to the device and structured such that the image decoding takes place in one of an intra-image decoding mode or in an inter-image decoding mode, in the intra-image decoding mode the image information of the image points is transformed, in the inter-image decoding mode difference image information of image information of two successive images is transformed, in the inter-image decoding mode a first inverse shape-adapted transformation coding is carried out, and in the intra-image decoding mode a second inverse shape-adapted transformation coding, different from the first inverse shape-adapted transformation coding, is carried out.

Claim 23

An arrangement for decoding a digitized image having image objects having an arbitrary number of image points, comprising: device for receiving image points of the digitized image; and a processor unit connected to the device and structured such that the image decoding takes place in one of an intra-image decoding mode or in an inter-image decoding mode, in the intra-image decoding mode the image information of the image points is transformed, in the inter-image decoding mode difference image information of image information of two successive images is transformed, in the inter-image decoding mode a first inverse shape-adapted transformation coding is carried out, and in the intra-image decoding mode a second inverse shape-adapted transformation coding, different from the first inverse shape-adapted transformation coding, is carried out.

Claim 24

The arrangement according to claim 16 , wherein the processor unit is such that a variant of a shape-adapted inverse discrete cosine transformation is used as a first inverse shape-adapted transformation coding, and an inverse shape-adapted discrete cosine transformation is used as second inverse shape-adapted transformation coding.

Claim 25

The arrangement according to claim 16 , the processor unit is structured such that at least one of the first inverse shape-adapted transformation coding and the second inverse shape-adapted transformation coding takes place such that a signal energy of the image points to be transformed in a spatial domain is approximately equal to a signal energy of transformed image points in a frequency domain.

Claim 26

A arrangement for decoding a digitized image having image objects having an arbitrary number of image points, comprising: device for receiving image points of the digitized image; and a processor unit connected to the device and structured such that the image decoding takes place in one of an intra-image decoding mode or in an inter-image decoding mode, in the intra-image decoding mode the image information of the image points is transformed, in the inter-image decoding mode difference image information of image information of two successive images is transformed, in the inter-image decoding mode a first inverse shape-adapted transformation coding is carried out, and in the intra-image decoding mode a second inverse shape-adapted transformation coding, different from the first inverse shape-adapted transformation coding, is carried out; wherein the processor unit is structured such that image points x j transformed in the first inverse shape-adapted transformation coding are formed from transformation coefficients c j according to the following rule: x j =((2 /N ))( DCT−N ( p,k )) −1 ·c j , whereby N designates a size of the image vector to be transformed in which the transformed image points are contained, DCT−N designates a transformation matrix of size N×N, p, k designate indices, with p, k ε(0, N−1), ( ) − designates an inversion of a matrix.

Claim 27

A arrangement for decoding a digitized image having image objects having an arbitrary number of image points, comprising: device for receiving image points of the digitized image; and a processor unit connected to the device and structured such that the image decoding takes place in one of an intra-image decoding mode or in an inter-image decoding mode, in the intra-image decoding mode the image information of the image points is transformed, in the inter-image decoding mode difference image information of image information of two successive images is transformed, in the inter-image decoding mode a first inverse shape-adapted transformation coding is carried out, and in the intra-image decoding mode a second inverse shape-adapted transformation coding, different from the first inverse shape-adapted transformation coding, is carried out; wherein the processor unit is structured such that image points x j transformed in the first inverse shape-adapted transformation coding are formed from transformation coefficients c j according to the following rule: x j =((2 /N ))( DCT−N ( p,k )) −1 ·c j , whereby N designates a size of the image vector to be transformed in which the transformed image points are contained, DCT−N designates a transformation matrix of size N×N, p, k designate indices, with p, k ε(0, N−1), ( ) − designates an inversion of a matrix.

Claim 28

The arrangement according to claim 16 , wherein the processor unit is structured such that the first inverse shape-adapted transformation coding is applied only to edge image blocks.