Video to film conversion
AssigneeSony United Kingdom Limited
InventorJohn W. Richards
Life of this patent
Estimating the term…
Abstract
In a method of converting a 60 field/s 2:1 interlaced video signal to 24 frame/s film, for each sequence of five input fields: the fields of at least one pair of the input fields are each progressive scan converted to form a pair of frames, and a weighted addition of the frames is made on a pixel-by-pixel basis to form an output video frame with a shifted temporal centroid, so that the temporal centroids of the output video frames are equally spaced. The output video frames are then recorded on film. In another method, the progressive scan conversion and weighted addition is performed by a single filter.
Claims32
A method of converting a 60 field/s 2:1 interlaced digital video signal comprising a plurality of sequences of five input fields to 24 frame/s film, comprising the steps, for each said sequence of five input fields, of:
- progressive scan converting each of one pair of the five input fields to form one pair of intermediate frames, each intermediate frame comprising an array of pixels each having a respective value and a respective location in said intermediate frame;
- combining the intermediate frames of said one pair to form one output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to respective locations in said intermediate frames, said value of each pixel in said one output frame being a weighted combination of said values of said pixels at the corresponding locations in said intermediate frames of said one pair;
- progressive scan converting each of another pair of the five input fields to form another pair of intermediate frames, each intermediate frame comprising an array of pixels each having a respective value and a respective location in said intermediate frame;
- combining the intermediate frames of said other pair to form another output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to respective locations in said intermediate frames, said value of each pixel in said other output frame being a weighted combination of said values of said pixels at the corresponding locations in said intermediate frames of said other pair;
- and
- recording said one and said other output video frames on film.
A method of converting a 60 field/s 2:1 interlaced digital video signal comprising a plurality of sequences of five input fields to 24 frame/s film, each input field comprising an array of pixels each having a value and a respective location in said input field, comprising the steps, for each said sequence of five input fields, of:
- combining the fields of one pair of the five input fields to form one output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to a respective location in one or the other of said one pair of fields, said value of each pixel in said one output frame being a weighted combination of said value of said pixel at the corresponding location in one of said fields of said one pair and the values of the pixels at locations above and below that location in said other field of said one pair;
- combining the fields of another pair of said five input fields to form another output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to a respective location in one or the other of said one pair of fields, said value of each pixel in said other output frame being a weighted combination of said value of said pixel at the corresponding location in one of said fields of said other pair and the values of the pixels at locations above and below that location in said other field of said other pair;
- and
- recording said one and said other output video frames on film.
A method of converting a 60 field/s 2:1 interlaced digital video signal comprising a plurality of sequences of five input fields to 24 frame/s film, comprising the steps, for each said sequence of five input fields, of:
- progressive scan converting each of one pair of the five input fields to form one pair of intermediate frames;
- combining the intermediate frames of said one pair to form one output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to respective locations in said intermediate frames, said value of each pixel in said one output frame being a combination of said values of said pixels at the corresponding locations in said intermediate frames of said one pair;
- progressive scan converting a further one of said five input fields to form a further output frame;
- and
- recording said one and said further output video frames on film.
A method of converting a 60 field/s 2:1 interlaced digital video signal comprising a plurality of sequences of five input fields to 24 frame/s film, each input field comprising an array of pixels each having a value and a respective location in said input field, comprising the steps, for each said sequence of five input fields, of:
- combining the fields of one pair of said five input fields to form one output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to a respective location in one or the other of said one pair of fields, said value of each pixel in said one output frame being a combination of said value of said pixel at the corresponding location in one of the fields of said one pair and the values of the pixels at locations above and below that location in said other field of said one pair;
- progressive scan converting a further one of said five input fields to form a further output video frame;
- and
- recording said one and said further output video frames on film.
An apparatus for converting a 60 field/s 2:1 interlaced digital video signal comprising a plurality of sequences of five input fields to 24 frame/s film, comprising:
- means for progressive scan converting each of one pair of the five input fields to form one pair of intermediate frames, each intermediate frame comprising an array of pixels each having a respective value and a respective location in said intermediate frame;
- means for combining the intermediate frames of said one pair to form one output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to respective locations in said intermediate frames, said value of each pixel in said one output frame being a weighted combination of said values of said pixels at the corresponding locations in said intermediate frames of said one pair;
- means for progressive scan converting each of another pair of the five input fields to form another pair of intermediate frames, each intermediate frame comprising an array of pixels each having a respective value and a respective location in said intermediate frame;
- means for combining the intermediate frames of said other pair to form another output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to respective locations in said intermediate frames, said value of each pixel in said other output frame being a weighted combination of said values of said pixels at the corresponding locations in said intermediate frames of said other pair;
- and
- means for recording said one and said other output video frames
An apparatus for converting a 60 field/s 2:1 interlaced digital video signal comprising a plurality of sequences of five input fields to 24 frame/s film, each input field comprising an array of pixels each having a value and a respective location in said input field, comprising:
- means for combining the fields of one pair of the five input fields to form one output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to a respective location in one or the other of said one pair of fields, said value of each pixel in said one output frame being a weighted combination of said value of said pixel at the corresponding location in one of said fields of said one pair and the values of the pixels at locations above and below that location in said other field of said one pair;
- means for combining the fields of another pair of said five input fields to form another output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to a respective location in one or the other of said one pair of fields, said value of each pixel in said other output frame being a weighted combination of said value of said pixel at the corresponding location in one of said fields of said other pair and the values of the pixels at locations above and below that location in said other field of said other pair;
- and
- means for recording said one and said other output video frames on film.
An apparatus for converting a 60 frame/s 2:1 interlaced digital video signal comprising a plurality of sequences of five input fields to 24 frame/s film, comprising the steps, for each said sequence of five input fields, of:
- means for progressive scan converting each of one pair of the five input fields to form one pair of intermediate frames;
- means for combining the intermediate frames of said one pair to form one output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to respective locations in said intermediate frames, said value of each pixel in said one output frame being a combination of said values of said pixels at the corresponding locations in said intermediate frames of said one pari;
- means for progressive scan converting a further one of said five fields to form a further output frame;
- and
- means for recording said one and said further output video frames on film.
An apparatus for converting a 60 field/s 2:1 interlaced digital video signal comprising a plurality of sequences of five input fields to 24 frame/s film, each input field comprising an array of pixels each having a value and a respective location in said input field, comprising the steps, for each said sequence of five input fields, of:
- means for combining the fields of one pair of said five input fields to form one output video frame, each output video frame comprising an array of pixels each having a respective value and a respective location in said output frame corresponding to a respective location in one or the other of said one pair of fields, said value of each pixel in said one output frame being a combination of said value of said pixel at the corresponding location in one of the fields of said one pair and the values of the pixels at locations above and below that location in said other field of said one pair;
- means for progressive scan converting a further one of said five input fields to form a further output video frame;
- and
- means for recording said one and said further output video frames on film.
Dependencies are inferred from the claim text.