Motion image rendering systems and methods
AssigneeSnell Limited
InventorMartin Weston
Life of this patent
Estimating the term…
Abstract
Systems and methods of rendering a motion image. A television signal is modified through a sine wave motion judder component to introduce intentional motion judder which can replicate the appearance of cinematic projection. To present 24 frames per second film via a 60 Hz television system with the “look” of a 72 Hz cinematic projector, a judder oscillator is set to generate a 24 Hz sinewave having a peak amplitude equal to 38.5% of the time difference between 24 Hz frames. The motion-judder component may periodically reverse the apparent direction of motion.
Claims25
A method of modifying, in a processor, an input sequence of temporal image-samples representing a moving image so as to obtain an output sequence of temporal image-samples in which the appearance of the said motion has been changed, the method comprising:
- temporally interpolating said input temporal image-samples to create the said output sequence;
- and
- introducing an intentional, periodic motion-judder component that is visible when the said output temporal image-samples are displayed.
A method of representing nominal 24 frame per second film frames in a nominal 60 field per second television system, wherein respective television fields are created in a five field sequence, the method comprising:
- corresponding a first television field to a film frame;
- and
- creating a second field, a third field, a fourth field, and a fifth field by temporally interpolating film frames either forwards or backwards in a temporal interpolator by a time equal to 17.1% of the reciprocal of the film frame rate.
A method of modifying, in a processor, a sequence of television images corresponding to a nominal temporal sampling rate of 60 Hz in which the said images are modified according to a five-frame sequence, the method comprising:
- generating a first image, the first image the same as a first field of the sequence;
- generating a second image by temporally shifting a second field of the sequence backward by 30.9%;
- generating a third image and a fourth image by interchanging a third field and a fourth field of the sequence;
- and
- generating a fifth image by temporally shifting a fifth field of the sequence forward by 30.9%.
An apparatus for modifying an input sequence of temporal image-samples representing a moving image so as to obtain an output sequence of temporal image-samples in which the appearance of the said motion has been changed, the apparatus comprising:
- a temporal interpolator configured to receive said input samples;
- and
- a temporal phase signal generator configured to generate a temporal phase signal,
- wherein the temporal interpolator serves, through interpolation of said input samples under the control of said phase signal, to create the said output sequence, and
- wherein the temporal phase signal includes a periodic motion-judder component such that intentional, visible, periodic motion-judder is introduced when the said output temporal image-samples are displayed.
An apparatus for representing nominal 24 frame per second film frames in a nominal 60 field per second television system wherein respective television fields are created in a five field sequence, the apparatus comprising:
- a processor configured to generate
- a first television field corresponding to a film frame;
- and
- a second television field, a third television field, a fourth television field, and a fifth television field created by temporally interpolating film frames either forwards or backwards by a time equal to 17.1% of the reciprocal of the film frame rate.
An apparatus for modifying a sequence of television images corresponding to a nominal temporal sampling rate of 60 Hz, wherein the said images are modified according to a five-field sequence, the apparatus comprising:
- a processor configured to generate
- a first image, the first image the same as a first field of the sequence,
- a second image by temporally shifting a second field of the sequence backward by 30.9%,
- a third image and a fourth image by interchanging a third field and a fourth field of the sequence, and
- a fifth image by temporally shifting a fifth field of the sequence forward by 30.9%.
A computer readable medium comprising:
- instructions configured to cause a programmable processor to modify an input sequence of temporal image-samples representing a moving image so as to obtain an output sequence of temporal image-samples in which the appearance of the said motion has been changed,
- wherein the said input temporal image-samples are temporally interpolated to create the said output sequence and an intentional, periodic motion judder component is introduced that is visible when the said output temporal image-samples are displayed.
A computer readable medium comprising:
- instructions configured to cause a programmable processor to represent nominal 24 frame per second film frames in a nominal 60 field per second television system,
- wherein respective television fields are created in a five field sequence in which:
- a first television field corresponds to a film frame, and
- a second field, a third field, a fourth field, and a fifth field are created by temporally interpolating film frames either forwards or backwards in a temporal interpolator by a time equal to 17.1% of the reciprocal of the film frame rate.
A computer readable medium comprising:
- instructions configured to cause a programmable processor to modify a sequence of television images corresponding to a nominal temporal sampling rate of 60 Hz in which the said images are modified according to a five-image sequence where
- a first image is unmodified,
- a second image is temporally shifted backwards by 30.9% of the time between adjacent images in the sequence,
- a third field and a fourth field are interchanged, and
- a fifth image is temporally shifted forwards by 30.9% of the time between adjacent images in the sequence.
Dependencies are inferred from the claim text.