Siemens Aktiengesellschaft

Infineon Technologies Ag

Siemens Aktiengesellshcsft

Robert Kutka

Gero Bäse

Norbert Oertel

Andreas Hutter

Peter Amon

Jürgen Pandel

Bernhard Agthe

Hubert Jäger

Juergen Pandel

Christian Winkler

Frank Burkert

Wenrong Weng

Ralf Buschmann

Stathis Panis

Philippe Wendling

Colin Estermann

Oliver Beider

Klaus Illgner-Fehns

Norbert Ortel

Gero Base

Jurgen Pandel

An encoder encodes a video signal formed of video frames, each including image blocks. The encoder includes a processing unit which calculates at least one high resolution reference image block on the basis of previously encoded image blocks by executing a super resolution algorithm to perform a local motion compensation; and a motion compensation unit which calculates on the basis of the calculated high resolution reference image block a temporal predictor which is subtracted from a current image block of the video signal. Together, the encoder and a corresponding decoder improve the signal quality of a video signal significantly.

Method and apparatus for encoding and decoding video signal

Methods and devices transform image data, which are transformed by a compression filter before being compressed and stored in a reference image memory. In an extension, an inverse transformation to that of the compression filter is performed by a decompression filter when image data from the reference memory are read out and decompressed. The methods and devices can be used for image compression methods and image decompression methods that use reference image memories.

Compression and decompression of reference images in a video encoder

A reconstructed image is provided within the framework of predictive coding. The reconstructed image is compressed according to a coding mode of an image coding device and stored in a reference image memory.

Compression and decompression of reference images in video coding device

Files which are available for dissemination in a controlled peer-to-peer network are provided with a watermark comprising a large number of watermark elements. Upon download, the composition of the parts of the file which are obtained from a plurality of source stations provides a new watermark which can clearly be associated with the target station. By storing information about forwarded watermark elements of a network server, it is possible to reconstruct for each file the network station from which this file originates.

Method and peer network for ascertaining the peer network originating station for a file

A method carries out mobile communication between a mobile unit and a communications device, which exchange voice messages using a telecommunications protocol. During the method, at least one image can be generated by the mobile unit. In the event that at least one image is generated by the mobile unit, at least this image is transmitted to the communications device. On the part of the communications device, an image object is selected based on the transmitted image, and a position of this image object is determined. The determined position is transmitted by the communications device to the mobile unit, and the mobile unit marks at least one of the images in such a manner that, starting from at least one of the images, which is taken as a basis for the selection of the image object, and from the position, a location of the selected image object is specified for at least one image to be marked and a marking object is superimposed upon at least one of the images at the position.

Method for carrying out mobile communication by marking image objects, and mobile unit and communications device

A method determines a predicted image area for an image area, in which a temporal predictor for the image area is determined based on a reconstructed image that precedes said image, a local predictor for the image area is determined within a reconstructed image area of the image, a margin of error between the image area and the image area predicted image area is determined by the local predictor using the reconstructed image area and by the temporal predictor using one of the preceding images. A predicted image area can be reconstructed. Also disclosed are an establishing device for carrying out the method for determining a predicted image area as well as a reconstructing device for carrying out the reconstruction method.

Methods and devices for the determination and reconstruction of a predicted image area

Disclosed are methods and devices for compressing and decompressing video data streams, according to which the statistical relationship between image symbols and the context assigned thereto is used for compression. Particularly disclosed is a context-sensitive encoding unit in which the image symbols filed in an image storage are assigned to different encoding branches via a context switch, where they are encoded and compressed by a Golomb encoder and a run length encoder.

Context-sensitive encoding and decoding of a video data stream

In order to realize effective picture compression without significantly impairing the resolution, it is proposed that the picture to be compressed be subdivided into a plurality of picture areas, for example into picture blocks each having 16&#xd7;16 pixels, and the picture areas be subdivided into a plurality of layers, in particular into three layers, which correspond to different sampling patterns. The pixels (13-15) of a layer are in each case predicted from adjacent pixels of the other layers, in particular of the already previously processed and coded layers, the prediction area being coded. The invention is suitable in particular for use in video coders or video decoders with motion-compensated prediction, in order to compress the reference picture to be stored in a reference picture memory ().

Method and device for picture compression using a plurality of sampling patterns

A method is described for transmitting a byte stream () from a transmitter unit to a receiver unit in a network protocol, with the following steps: Removal of at least one data area () of the byte stream () from the byte stream, Transmission to the receiving unit of information relating to which data area () or which data areas () has or have been removed from the byte stream () and/or relating to the way in which the shortened byte stream is to be further processed, Transmission of the byte stream () shortened by at least one data area () to the receiver unit, which, from the information and the shortened byte stream, determines and further processes the at least one data area removed by the transmitter unit.

Compression method for a byte stream in network protocols

A method and apparatus are provided for storing and processing picture information of temporally successive pictures wherein in each case at least one picture area is selected from each temporally preceding picture taking into account, the picture information determined from each selected picture area is stored with an assignment information item, which enables an assignment of the respective picture area and thus also of the picture information of the respective picture area to the corresponding picture and to the position of the picture area within the corresponding picture, at least one mixed picture is formed from the picture information of the respectively stored, selected picture areas, taking the account of the assignment information, and the mixed picture is used in the context of a motion estimation, a motion compensation or an error masking for an image.

Method and apparatus for storing and processing picture information of temporally successive pictures

Motion estimation is in each case carried out for the entire image, for that image and for a predetermined number of previous images, with an image motion vector being determined in each case. The images are stored in a memory having been compensated for motion, using the respective image motion vector. A predetermined area of the memory is read in order to form the motion-compensated image.

Computer-assisted motion compensation of a digitized image

Individual data packets are transmitted together with information about the end of a respective data packet, without padding, and then virtual padding is effected for generating redundant packets. At the receiver, the data packets are obtained using the information about the respective end of packet if no packet was lost, and are only expanded by padding if a packet has been lost and can be reconstructed by one or more redundant packets.

Method and apparatus for protecting against packet losses in packet-oriented data transmission

A method and an arrangement in which a digitized image with picture elements is allocated to a number of image segments. The image segments, preferably image blocks, are spread such that interspaces remain between the image blocks to be encoded. The interspaces are interpolated after decoding.

Method for coding and decoding a digitalized image

The present invention relates to a method of filtering edges of a picture block with an edge-smoothing filter. The selection of the edge-smoothing filter depends on the size of the movement vector associated with each picture block BV to clarify the picture image and increase image quality. Alternatively, the selection of the edge-smoothing filter depends on the picture quality or both picture quality and the movement vector.

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Geltendorf, Germany

Robert Kutka