Method and apparatus for recovering a display picture sequence from a coded digital video signal
OwnerMichael Weber, Ingo Huetterinventors
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Abstract
A method for recovering a display picture sequence from a coded digital video signal with a variable data rate comprises the steps of decoding the coded digital video signal in order to obtain an intermediate picture sequence, detecting the data rate of the coded digital video signal, and a quantity representative of the amount of motion in the pictures of the intermediate picture sequence, and filtering the intermediate picture sequence in order to obtain the display picture sequence, wherein a filtering characteristic of the filtering step is defined on the basis of the detected data rate and the detected motion quantity.
Claims9
1-11. (canceled)
A method for recovering a display picture sequence from a coded digital video signal having a variable data rate, comprising the steps of:
- decoding the coded digital video signal in order to obtain an intermediate picture sequence,
- filtering the intermediate picture sequence in order to obtain the display picture sequence,
- detecting the data rate of the coded digital video signal,
- detecting a quantity representative of the amount of motion in the images;
- adaptively controlling a filtering characteristic of the filtering step on the basis of the detected data rate and the quantity representative of the amount of motion, wherein the quantity representative of the amount of motion in the images is determined from motion vectors transmitted with the coded digital video signal, and wherein the entire area of a picture is uniformly filtered using the same filter characteristic.
An apparatus for recovering a display picture sequence from a coded digital video signal having a variable data rate, comprising
- a decoder for decoding the coded digital video signal in order to obtain an intermediate picture sequence,
- a filter for filtering the intermediate picture sequence in order to obtain the display picture sequence,
- a measuring device for detecting the data rate of the coded digital video signal,
- a measuring device for detecting a quantity representative of the amount of motion in the intermediary picture sequence,
- wherein a filtering characteristic of the filter can be adaptively controlled on the basis of the detected data rate and/or the detected quantity representative of the amount of motion, wherein the measuring device is adapted to determine the quantity representative of the amount of motion in the images from motion vectors transmitted with the coded digital video signal, and wherein the filter is adapted to uniformly filter the entire area of a picture using the same characteristic.
Dependencies are inferred from the claim text.