Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
  • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
  • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
  • H04N19/615—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding using motion compensated temporal filtering [MCTF]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
  • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
  • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
  • H04N19/103—Selection of coding mode or of prediction mode
  • H04N19/114—Adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
  • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
  • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
  • H04N19/146—Data rate or code amount at the encoder output
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
  • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
  • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
  • H04N19/179—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a scene or a shot
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
  • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
  • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
  • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
  • H04N19/63—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
  • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
  • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
  • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
  • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
  • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]

Definitions

• the invention relates to a method according to the preamble of claim 1 and a picture decoding method according to the preamble of claim 8. Furthermore, the invention also relates to an encoder according to the preamble of claim 10 and a decoding device according to the preamble of claim.
• video coding methods for the efficient coding of a sequence of pictures use specific signal properties.
• local and temporal dependencies of the individual images or of the pixels of these images are exploited.
• Hybrid coding methods such as the 25 standards IXU-T H.263 or ITU-T H.264 [2,3], and so-called three-dimensional frequency coding approaches are basically differentiated in today's techniques for video coding.
• both methods attempt to encode the video signal, which consists of the sequence of images
• both spatially and temporally hybrid encoding methods initially use a motion-compensated prediction in the temporal direction and then a two-dimensional transformation of an er ⁇ produced differential images, such as by means of a two-dimensional discrete cosine transformation (DCT - Discret Cosinus Transformation), in order to remove a local correlation 35 between adjacent pixels within the difference image.
• DCT - Discret Cosinus Transformation two-dimensional discrete cosine transformation
• the sequence of pictures before the local two-dimensional decoration relation is broken down into a plurality of "temporal" frequency bands, such as for example two frequency bands in a high and a low frequency band for the temporal high and low frequency image components.
• spectral decomposition of the distribution of the frequencies occurring in these frequency bands is strongly dependent on the amount of motion occurring in the video signal depend gi ⁇ f - If the considered video signal has no moving or changing elements are all high-frequency "Zeitspektralanteile" equal to zero and the entire In the normal case, however, a temporal image change will always be visible in a sequence of images, such as a local object shift, an object size change, or a scene change, resulting in an energy distribution over several spectral coefficients. where also high-frequency components arise.
• the motion-compensated, time-filtered subband coding can also be used to create a scalable video data stream.
• this makes temporal, qualitative or also local skability possible.
• chapter 3.2.4 a combined scaling is presented. This will be done with help of the hybrid coding method, two different basic qualities (LO, L1) are achieved.
• LO, L1 two different basic qualities
• additionally scaled video data streams are added, such as, for example, L2, L3, L4 and / or L5.
• L2,..., L5 are generated in [4] by means of a motion-compensated, time-filtered subband coding.
• a scalable video data stream can be generated by means of a first coding method after a motion-compensated, predictive coding and a second coding method after a motion-compensated, temporally filtered partial-band coding.
• the object underlying the invention is to provide a method for image and image decoding, an encoding and a decoding device, which a picture and image decoding a sequence of original images with a move-compensated, temporally filtered Operabandcodierver- drive with the aid of a motion-compensated , Predictive coding method in a simple and efficient way allows.
• This object is achieved on the basis of the image coding method according to the preamble of claim 1 by its characterizing features as well as on the basis of the image decoding method according to the preamble of claim 8 by its characterizing features. Furthermore, this object is achieved by the encoding device according to the preamble of claim 9 by its characterizing features and starting from the decoding device according to the preamble of claim 10 by its characterizing features.
• a sequence of decoded images is generated from the sequence of original images with the aid of a first coding method after a motion-compensated, predictive coding; before the image coding, a second code is generated.
• the method according to a motion-compensated, temporally ge filtered subband coding a start image of an image group to be encoded successive original images based on a determined coding property of a decoding image used to generate an output image of a low resolution level of this image group to be used, decoded image, wherein in the image encoding of aufeinan ⁇ the following original images of the image group to be encoded and at least one decoded image in each resolution level at least one output image is generated.
• the coding properties of the decoded images, which are generated by the first coding method are taken into account by the method according to the invention for image coding.
• This improves the compression characteristic for the second coding method such as, for example, the compression rate or the image quality with a constant compression rate.
• the error coding (error drift) of an image information generated by the second encoding method is reduced by suitable selection of the start picture for the picture encoding by the second coding method and thus the picture quality is increased.
• the method according to the invention allows random access to individual images which have been generated after the first and / or second coding process.
• the start image is determined on the basis of the decoded image used if the coding property determination shows that at least one image block of this used, decoded image has been INTRA-coded. Since an INTRA-coded image block is often encoded in higher image quality and no error drift occurs in the INTRA-coded image block, at least one image part of the image is thus encoded Output image of the low resolution level achieves a reduced signal energy and thereby an improved Kompres ⁇ sion property allows. An error drift does not occur, since with INTRA coding no prediction takes place from predecessor images and thus no errors can be taken over.
• the start image is determined on the basis of the decoded image used if the coding property determination shows that a defined block number of image blocks of this decoded image used was INTRA-coded.
• the start image is determined on the basis of the decoded image used if the coding property determination shows that all the image blocks of this used, decoded image are INTRA-coded.
• a number of original images of the image group to be encoded are set as a function of the determined coding property. This ensures that the number of successive original images of the image group can be set in such a way that the decoded image can be assigned to produce a difference image for the output image of the low resolution level, which results in a very low signal energy to be encoded. If at least one intermediate image (Z1, Z2, Z3) is generated in each resolution plane (R1, R2) and the intermediate images and the output image of the low resolution plane are compressed, a reduction of the data volume of the intermediate images and of the output image of the low resolution level reached. If additionally compressed according to a wavelet-based transformation, this results in a particularly efficient reduction of the data volume of the intermediate images and the output image of the low resolution level.
• the invention further relates to a picture decoding method for decoding at least one picture encoded by the picture encoding method. It is thus achieved that both the encoded images of the first encoding method and the intermediate images and the output image of the low resolution level of the second encoding method, which were generated according to the method for image coding, can be decoded.
• the invention relates to an encoding device having means for forming a sequence of original images. This makes it possible for the method for forming coding to be carried out in a device, such as a mobile phone.
• the invention also includes a decoding device with means for performing the image decoding method.
• the image decoding method can be used in a device, e.g. implemented on a mobile phone.
• FIGS. 1 to 5 In detail show:
• FIG. 1 is a schematic representation of an encoding of a sequence of original images which are compressed by a first coding method after a motion-compensated, predictive coding, and be encoded with a second coding method after a motion-compensated, temporally filtered subband coding in consideration of the decoded pictures of the first coding method;
• FIG. 2 shows a detailed illustration of the creation of an intermediate image and of an output image by means of the second coding method, which are generated from two input images in a plurality of processing steps within the first resolution plane, a decoded image of the first coding process being taken into account during the creation;
• FIG. 3 is a schematic representation of the processing steps within the low resolution level, wherein an intermediate image and an output image are generated using two input images and two decoded images;
• FIG. 4 is a schematic representation of an encoding device, a decoding device and a transmission medium for carrying out the method according to the invention
• FIG. 5 is a schematic representation of the compression of a sequence of original images with a first and a second coding method, wherein a plurality of image groups with a respective different number of original images to be encoded are compressed by the second coding method.
• FIGS. 1 to 5 Elements with the same function and mode of operation are provided in FIGS. 1 to 5 with the same reference numerals.
• FIG. 1 shows an exemplary embodiment of the method according to the invention.
• This is a sequence of original images Ol, ..., ON are compressed using a first coding method CV1 and a second coding method CV2.
• These original images Ol, .--, ON were generated, for example, by a camera K and are provided in color format with a luminance component Y, and two crom- mant components CR, CB in an image size with 640x480 pixels.
• the original images Ol,..., ON can be subjected to image preprocessing, such as noise suppression or edge sharpening, before their encoding.
• the first coding method CV1 carries out a motion-compensated, predictive coding of the original pictures Ol,..., ON.
• motion-compensated, predictive coding methods are known, such as , for example, the ITU-T H.263 standard.
• images Bl, ..., BM encoded from the original images Ol, ..., ON can be generated using an INTRA coding mode and / or an INTER coding mode.
• the INTRA coding mode encodes individual picture blocks of the respective original picture Ol,..., ON without taking into account other original pictures Ol,...
• the INTER coding mode individual picture blocks of the respective original picture Ol,..., ON are compressed taking into account one or more pictures already encoded Bl,...
• the number M of the encoded pictures Bl, ..., BM may differ from the number N of the original pictures Ol,.., ON, since, for example, not all the original pictures Ol,..., ON are encoded.
• a sequence of decoded images D 1,... DM are created from the encoded images Bl,..., BM with the aid of the first coding method CV1. Furthermore, for each decoded picture D1,..., DM can have its own decoder. list which indicates which image blocks of the respective decoded image D1,..., DM have been encoded with the INTRA encoding mode and which have been encoded with the INTER encoding mode. These decoded images D1,..., DM are taken into account in the subsequent processing steps by the second coding method CV2. For the exemplary embodiment according to FIG.
• all successive original images Ol,..., ON of a respective image group GOP are encoded using the second encoding method CV2.
• the number of original images to be encoded of the second image group GOP2 has been selected to be four.
• the number of original images to be encoded per image group GOP may vary, e.g. first two, then four and then eight original images are encoded in the respective image group GOP1, GOP2, GOP3.
• the first original image of the second image group GOP2 to be encoded is the third original image O3.
• the respective first original image of a respective image group GOP is referred to below as the start image BSP.
• a motion-compensated, temporally filtered subband coding is to be understood as an encoding method in which in each case at least two input images, at least one output image is generated in a plurality of resolution planes.
• still images can be created.
• the respective intermediate image represents the motion-compensated components of the associated input images of a first sub-band.
• the respective output image comprises the motion-compensated components of the associated input images of a second sub-band.
• the first subband includes, for example, the high frequency and the second Xeilband the low-frequency components. In each lower resolution level, at least two output images of the higher resolution level become the input images.
• the second coding method CV2 depicted in FIG. 1 consists of two resolution zones R1, R2.
• the first resolution plane R1 in each case two input images El and E2, E3 and E4 and the two associated decoded images D4, D6 are respectively generated an intermediate image Z1, Z2 and one output image A1, A2.
• the two output images Al, A2 are used as input images E5, E6 of the next resolution level R2.
• the second resolution level R2 which in this embodiment corresponds to the low resolution level
• a third intermediate image Z3 and a third output image A3 are generated from the input images E5, E6 together with the decoded images D3, D5.
• the low resolution level R2 also represents a lowest resolution level.
• the lowest resolution level is to be understood as the resolution level which only generates an output image within the image group GOP.
• FIG. 2 shows two input images El, E2 which correspond to the original images O3 and 04, respectively.
• the second input image E2 is subdivided, for example, into a plurality of image blocks Q1,..., Q9. These image blocks Q1,.., Q9, which correspond to the macroblocks known from [5], for example, may comprise 16 ⁇ 16 pixels.
• the second encoding method CV2 performs a motion estimation on the first input image E1 for at least one image block Q1,..., Q9 of the second input image E2, for example for the image block Q5. Possible strategies for performing the motion estimation are known from [5].
• this found image area becomes after a motion compensation MC with the Bilciblock Q5 of the second input image E2 high-pass filtered, spielmik by subtracting the respective pixels.
• the motion vectors found are combined in a first motion vector list ML1.
• a corresponding image block R1,..., R.9 for the image block Q1,..., Q9 can be used for temporal low-pass filtering from the second input image E2 belonging decoded image D4 are used.
• No matching image area in the first input image El has been found for the image block Q6, so that the image block R6 of the fourth decoded image D4 is filtered with the image block Q6 of the second input image E2.
• the temporal high-pass filtering produces a first intermediate image Z1.
• the additional use of the fourth decoded image D4 during the production of the first intermediate image Z1 ensures that the first intermediate image Z1 has less signal energy, and thus by a subsequent compression process , such as a wavelet-based transformation, a higher compression rate or at a constant compression rate, a higher image quality can be achieved tat.
• the first output image Al is generated block by block.
• the respective image blocks of the first intermediate image Z1 which have been generated with the aid of the first input image El, are time-aligned with the first input image El using an inverse motion compensation IMC (ML1), which takes into account the motion vectors of the first motion vector list ML1 low-pass filtered.
• the temporal low-pass filtering can be carried out by adding the respective pixels of the inverse-motion-compensated image block of the first intermediate image Z1 and image block of the first input image El.
• the second output image A2 is generated in the same way from the input images E3 and E4.
• a second motion vector list ML2 is generated.
• the procedure for carrying out the method according to the invention was explained on the basis of pictures with 3 ⁇ 3 picture blocks.
• the number of image blocks may be arbitrary, e.g. Be 4x4, 8x9 or 11x9.
• the number of picture blocks of the decoded pictures and the input pictures may also be different.
• the individual processing steps of the second resolution level R2, which corresponds to the low resolution level will be explained in more detail below.
• ML3 a motion vector list ML3 is generated.
• an inverse motion compensation IMC (ML3) and taking into account the third input image E3, the provisional third output image A3V is created.
• the third intermediate image Z3 comprises the high-frequency components of the temporally filtered input images E5, E6.
• the provisional third output image A3V contains the low-pass components of the temporally filtered input images E5, E6. If the resolution levels R 1, R 2 are considered together, the preliminary third output image A3V represents the "temporal" low-pass components of the second group of images GOP 2 of successive original images O 3, O 4, O 5, O 6. In an additional processing step, by prediction, such as pixel by pixel Difference, the provisional third output image A3V and the belonging third decoded image D3, the third Aus ⁇ output image A3 generated.
• This third output image A3 and the intermediate images Z1, Z2, Z3 can be compressed before being transferred to a decoding device DV, for example by means of a wavelet transformation.
• the assignment of the start image BSP for the image coding according to the second coding method CV2 has been selected such that it corresponds to the third original image O3. Since the number of original images O3, - - -, O6 of the second image group GOP2 to be encoded has been selected to be four in the present embodiment, the original images O3, 04, O5, O6 are encoded in common. After their compression, the next four original images beginning with the seventh original image O7 can be compressed in the following in accordance with the second coding method CV2. This can be continued until the end of the sequence of original images Ol, ...., ON to be encoded. However, the second coding method CV2 can also combine more or less successive original pictures Ol,..., ON into a picture group GOP for encoding.
• the start image BSP of an image group GOP to be encoded from successive original images Ol,..., ON is generated on the basis of a determined coding property of an output image A3 of the low resolution level R2 of this image group GOP to be en ⁇ coded, decoded image D3. Since the image quality of the output image of the low resolution level, in the exemplary embodiment this is the third output image A3 of the second resolution level R2, depends on the associated decoded image, such as the third decoded image D3, the image quality of the associated one is decoded image of considerable importance.
• the picture quality of the associated decoded picture essentially depends on the coding property which this decoded picture was subject to when it was created by the first coding method CV1.
• the picture quality of the low-resolution picture output picture is considerably affected.
• an optimal choice of the start image BSP for the image group GOP for example, an image with low signal energy is generated for the third output image A3, which image can be compressed very efficiently.
• the coding property can be determined by evaluating the decoding list belonging to the respective decoded picture. Furthermore, the coding property can also be obtained by analyzing the encoded picture associated with the used decoded picture. For example, by analyzing the first encoded image B1, it can be determined which image blocks MBI in the first decoded image D1 were compressed by means of the INTRA or INTER coding mode.
• the start picture BSP is determined on the basis of the decoded picture used, eg D3, if the coding property determination shows that at least one picture block MBI of this used, decoded picture D3 was INTRA coded.
• an image block MBI is an image region of 16x16 pixels. Since the INTRA-coded picture block MBI, for example, is subject to lower quantization than in the case where this picture block MBI would have been INTER-coded, a higher picture quality results for the picture block MPI of the decoded picture D3 used than with an INTER coding. Thus, a differential image with a lower signal energy can be obtained for the third output image A3, which can be obtained, for example, by a downstream Velet compression can be compressed very efficiently.
• an INTRA-coded picture block MBI is also advantageous since, for example, occurring decoding errors within the sequence of encoded pictures B1,..., BM are not due to an INTRA-coded picture block MBI from a preceding encoded picture Bl, ••, BM are adopted and thus an aberration does not occur even in the associated decoded image Dl, ..., DM.
• the start image BSP can be determined on the basis of the decoded image D3 used if the coding property determination shows that a defined number of blocks AM has been INTRA-coded on picture blocks MPI of this decoded picture D3 used. If, for example, several possible starting images BSP are available, this variant of the method according to the invention selects that starting image BSP for the encoding of the image group GOP by the second coding method CV2, in which the predeterminable minimum number AM of INTRA- coded image blocks MBI of the associated decoded image Dl, ..., DM can be found. This will be explained in the following example.
• the start image BSP is to be chosen such that the decoded image used for the third output image A3 comprises at least 20 image blocks MBI which have been compressed by means of the INTRA coding mode.
• the third or fourth original image O3, O4 can be selected as the start image BSP.
• the decoded images associated with the third and fourth original images O3, O4 are the third and fourth decoded images D3, D4. In the third decoded image D3 there were 25 INTRA coded image blocks MBI and in the fourth decoded image D4 there were 19 INTRA coded image blocks MBI.
• the third original image 03 is selected as the start image BSP of the second image group GOP2 for encoding the sequence of original images Ol,..., ON.
• the starting picture BSP is defined on the basis of the decoded picture D3 used, if the coding determining that all picture blocks MBI of this decoded picture D3 used were INTRA-coded. This is advantageous since a small difference signal with a low signal energy can thus be found for the entire third output image A3. In this case, the starting point coincides with a decoded image D1,..., DM marked with "I".
• the start image BSP of the next image group to be encoded e.g. GOP2
• a picture group currently to be encoded e.g. GOPl
• the maximum number per image group is limited to six original images.
• the picture group GOP1 currently to be encocted is divided into two subgroups so that first six and then four original pictures are encoded in a respective picture group.
• a number of successive original images Ol,..., ON of the image group GOP to be encoded can be set as a function of the ascertaining coding property K1. This will be explained with reference to FIG. 5, whereby due to the ermit ⁇ telten coding property class as a start image BSP always diejeni- • gen original images Ol ..., ON be used in which all image blocks MPI the associated decoded images Dl. .., DM iNTRA coded.
• decoded images D1, ..., DM are marked with an "I.”
• the first original image Ol is used as the start image BSP of the first image group GOP1 for the encoding of the original images Ol, generates the output image All and the intermediate image ZIl.
• the encoding after the second coding Procedure CV2 is aborted already after the second original picture 02.
• the third image group GOP3 is encoded, whereby, for example, the output image A21 is created, thus the first image group GOP1 comprises two and the second image group GOP2 comprises four original images which are encoded by the second encoding process CV2.
• the encoded image information comprises, for example, the intermediate images Z1,..., Z3, the third output image A3, the encoded images B3, B4, B5, B6, and the motion vector lists ML1, ML2, ML3.
• further information is produced during the encoding, such as motion vectors in the first encoding method.
• a multiplicity of encoded image information is produced, which are generated in an analogous manner to the exemplary embodiment.
• the encoding device comprises a first EV Videoencodiermodul 'Vel with the aid of a sequence of Origi- nalrecin Ol, ...., ON after the first coding CVI into a sequence of encoded pictures Bl, ..., BM and therefrom ei ⁇ ne sequence decoded images Dl, ...., DM is generated.
• the encoding device EV comprises a second video encoding module VE2 for performing the encoding of a sequence of original images Ol,..., ON according to the second encoding method.
• the encoding device EV has a first storage device S1, which stores various images, such as the original images Ol,..., ON, organized for processing.
• the encoding device EV includes a transmission unit SE for transmitting encoded image information, such as the encoded images Bl,..., BM.
• the transmitting unit SE, the first memory device Sl, the first video coding module VE1 and the second video coding module VE2 are interconnected via a first connecting network VN1 for exchanging data and control information.
• the decoding device DV has a first video decoding module VD1 for decoding the encoded pictures B1,..., BM, which were created according to the first coding method CV1.
• the decoding device DV has a second video decoding module VD2 for decoding the images produced by the second encoding method CV2, such as the intermediate images Z1, Z2, Z3 and / or the third output image A3.
• the motion vector lists ML1, ...., ML3 are used to reconstruct the original images O3, 04, O5, O6.
• the decoding device DV comprises a receiving unit EE, with which the encoded Suiteinforma- functions such as the encoded images Bl, ...., BM are received and stored in a second memory device S2 for further processing.
• the decoding device DV also includes the second memory module S2, in which various information and data, such as, for example, the motion vector lists ML1, ...., ML3 are stored.
• the reception unit EE, the second memory device S2, the first video decoding module VD1 and the second video decoding module VD2 are connected to one another via a second connection network VN2 for exchanging data and control information.
• the transmission medium DEM is used to transmit the encoded image information from the encoding device EV to the decoding device DV.
• the encoding device EV and / or the decoding device DV can be used in a GSM standard device (GSM - Global System for Mobile Communications) or UMTS standard (UMTS Universal Mobile Telecommunications Systems) as well as in a computer unit which may be portable Device is integrated, housed.
• GSM Global System for Mobile Communications
• UMTS Universal Mobile Telecommunications Systems
• a wireless radio network such as e.g. according to the GSM standard
• a wired transmission medium such as e.g. an IP-based network (IP Internet Protocol) or ISDN (ISDN - Integrated Services Digital Network) can be used.
• IP Internet Protocol IP Internet Protocol
• ISDN ISDN - Integrated Services Digital Network
• a storage medium such as e.g. a CD (CD-Compact Disk) or a video server, to save for later Be ⁇ use.
• the invention also includes a picture decoding method in which the method of forming a sequence of original pictures Ol, ..., ON is decodable.
• the sequence of encoded images B1,..., BM is first decoded by the first video decoding module VD1 into a sequence of decoded images, the D1,..., DM.
• the second video decoding module VD2 generates a sequence of reconstructed pictures using the intermediate pictures Z1, Z2, Z3 and the third output picture A3 and with the aid of the motion vector lists ML1,..., ML3 and the decoded pictures D1,..., DM Rl, ... RM of the sequence of original images Ol, ..., ON.
• the reconstructed images Rl 7 ...
• the decoded images D1,..., DM generated by the first video coding module VD1 can also be reproduced on the monitor.
• the decoded images D 1,..., DM only comprise a reduced image quality
• the reconstructed images R 1,..., RM represent a high-quality image quality.
• it can be selected by the user whether a sequence of images in a low or in a high image quality is to be reproduced on the output medium.

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