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
  • H04N19/169—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
  • H04N19/17—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 an image region, e.g. an object
  • H04N19/176—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 an image region, e.g. an object the region being a block, e.g. a macroblock
• • 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
  • H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
  • H04N19/31—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability in the temporal domain
• • 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
  • H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
  • H04N19/36—Scalability techniques involving formatting the layers as a function of picture distortion after decoding, e.g. signal-to-noise [SNR] scalability
• • 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
  • H04N19/46—Embedding additional information in the video signal during the compression process
• • 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
  • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
  • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
  • H04N19/51—Motion estimation or motion compensation
  • H04N19/513—Processing of motion vectors
  • H04N19/517—Processing of motion vectors by encoding
  • H04N19/52—Processing of motion vectors by encoding by predictive encoding
• • 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
  • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]

Definitions

• the SI-slice is also called a switching-I-slice, which describes an exact adaptation of the M.acroblock in a an SP slice for direct access and error recovery purposes.
• the I_4 X 4 coding type allows the encoder to simply skip the prediction as well as the transform coding and instead directly transmit the values of coded samples.
• the I-pc M mode serves the following purposes: It allows the encoder to accurately represent the values of the samples. ER provides a way to accurately represent the values of very abnormal image content without data magnification. It also makes it possible to specify a hard limit for the number of bits that a macroblock handling coder must have without suffering the coding efficiency.
• each 4x4 block is predicted from spatially neighboring samples. Sixteen samples of the 4x4 block are predicted using previously decoded samples in adjacent blocks. One of 9 prediction modes can be used for each 4x4 block. In addition to the DC prediction (where a value is used to predict the entire 4x4 block), 8 directional prediction modes are specified. These modes are suitable for predicting directional structures in an image, such as edges at different angles.
• the given signal s [k] can be represented by l (k) and h (k), but each signal has the half sample rate. Since both the update step and the prediction step are completely invertible, the corresponding transformation can be interpreted as a critically sampled perfect reconstruction filter bank. In fact, it can be shown that any biorthogonal family of wavelet filters can be realized by a sequence of one or more prediction steps and one or more update steps.
• the normers 47 and 48 are supplied with suitably chosen scaling factors Fi and Fj 1 .
• the inverse-lifting scheme which corresponds to the synthesis filter bank, is shown in FIG. 4, on the right-hand side.
• the scalability concept should provide a high degree of flexibility for all scalability types, ie a high degree of flexibility both in terms of time as well as in terms of space and in terms of SNR.
• the present invention is based on the finding that bit rate reductions can not only be achieved with a motion-compensated prediction carried out within a scaling layer, but that further bit rate reductions are obtained with constant image quality by virtue of an intermediate scaling layer prediction of the residual images after the motion-compensated prediction from a lower layer, for example the base layer, to a higher layer, such as the extension layer, Maschinen ⁇ is performed.
• the encoder according to the invention further comprises an expansion-motion compensator or expansion-motion estimator 1014 for determining extension motion data.
• This extension movement data is then supplied to an expansion movement predictor 1016, which has on the output side an extension sequence of residual error codes. images and fed to a downstream interlayer predictor 1018.
• the expansion motion predictor thus performs the motion compensation that has been somewhat prepared by the motion compensator or motion estimator.
• the corresponding data is supplied via an extension motion data line 1080 to the motion data determiner 1078. If, however, the movement data flag 1070 indicates that no additional extension movement data has been transmitted for the extension layer, then necessary movement data are fetched via a line 1082 from the base layer, depending on the scalability used, either directly (line 1084) or after a high key by a 1087 push-button.
• the same reference indices are used as for the corresponding macroblock / sub-macroblock partitionings of the base layer block.
• the associated motion vectors are multiplied by a factor of 2. This factor applies to the situation shown in FIG. 6b, in which a base layer 1102 comprises half the area or number in pixels as the enhancement layer 1104. If the ratio of the spatial resolution of the base layer to the spatial resolution of the enhancement layer is not equal to 1 / 2, corresponding scaling factors are used for the motion vectors.
• the macroblock mode Qpel_Refinement_Mode is signaled.
• the flag 1100 is preferably present only if the base layer represents a layer with half the spatial resolution of the current layer. Otherwise, the macroblock mode (Qpel_Refinement_Mode) is not included in the set of possible macroblock modes.
• This macroblock mode is similar to the base layer mode.
• the macroblock partitioning as well as the reference indices and the motion vectors are derived as in the base layer mode. However, there is one for each motion vector additional quarter sample motion vector refinement -1.0 or +1 for each motion vector component which is additionally transmitted and added to the derived motion vector.
• the base-layer macroblock / sub-macroblock partitioning covering the upper left sample of the present macroblock / sub-macroblock partitioning uses the List X or a bi-prediction;
• the L ⁇ X reference index of the base layer macroblood / sub-macroblock partitioning, which includes the upper left sample of the current macroblock / sub-macroblock partitioning, is equal to the list X reference index of the current macro - block / suto macroblock partitioning.
• the method according to the invention can be implemented in hardware or in software.
• the implementation can take place on a digital storage medium, in particular a floppy disk or CD with electronically readable control signals, which can cooperate with a programmable computer system such that the method is carried out.
• the invention thus also exists in a computer program product with a program code stored on a machine-readable carrier for carrying out the method according to the invention, when the computer program product runs on a computer.
• the invention can thus be realized as a computer program with a program code for carrying out the method when the computer program runs on a computer.

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• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Compression Or Coding Systems Of Tv Signals (AREA)
• Compression, Expansion, Code Conversion, And Decoders (AREA)

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• 2005
  • 2005-09-21 WO PCT/EP2005/010227 patent/WO2006042612A1/de active Application Filing
  • 2005-09-21 JP JP2007536022A patent/JP5122288B2/ja active Active
  • 2005-09-21 EP EP05784915A patent/EP1800488A1/de not_active Withdrawn

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