Apparatus and method of frame rate up-conversion with dynamic quality control
AssigneeSilicon Integrated Systems Corp.
InventorsHung Wei Wu, Chih-Yu Chang, Wen-Yen Huang
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Abstract
A frame rate up-conversion apparatus comprises a motion vector detecting circuit, a dynamic quality control circuit, a motion compensation circuit and a pull-down recovery circuit. According to quality of motion vectors, a corresponding image output mode is determined dynamically. A visual impact due to incorrect motion vectors is reduced and the visual experience is also improved.
Claims18
An apparatus of frame rate up-conversion configured to receive a current image and a previous image and generate at least one intermediate image, the apparatus comprising:
- a motion vector (MV) detecting circuit for performing forward motion estimation and backward motion estimation to generate a forward MV table, a backward MV table and at least one table of minimum motion estimation (ME) errors according to the current image and the previous image;
- a control circuit for generating a control signal according to the forward MV table, the backward MV table and the at least one table of minimum ME errors;
- and
- a motion compensation circuit for performing corresponding image interpolation in response to the control signal to generate the at least one intermediate image according to the forward MV table, the backward MV table, the current image and the previous image;
- wherein the control signal is related to one of a high quality mode, at least one intermediate mode and a repeat mode;
- wherein the sequence of the current image and the previous image corresponds to an original film sequence;
- wherein in each of the at least one intermediate mode, the at least one intermediate image comprises at least one interpolated image, and the at least one interpolated image is related to the current image and the previous image;
- and
- wherein in each of the at least one intermediate mode, an arrangement of the at least one interpolated image keeps an object in the images moving with substantially constant speed.
An apparatus of frame rate up-conversion configured to receive a current image and a previous image and generate at least one intermediate image, the apparatus comprising:
- a motion vector (MV) detecting circuit for performing forward motion estimation and backward motion estimation to generate a forward MV table, a backward MV table and at least one table of minimum motion estimation (ME) errors according to the current image and the previous image;
- a control circuit for generating a control signal according to the forward MV table, the backward MV table and the at least one table of minimum ME errors;
- and
- a motion compensation circuit for performing corresponding image interpolation in response to the control signal to generate the at least one intermediate image according to the forward MV table, the backward MV table, the current image and the previous image;
- wherein the control signal is related to one of a high quality mode, at least one intermediate mode and a repeat mode;
- wherein the sequence of the current image and the previous image corresponds to an original film sequence;
- wherein in each of the at least one intermediate mode, the at least one intermediate image comprises at least one interpolated image, and the at least one interpolated image is related to the current image and the previous image;
- and
- wherein each of the at least one intermediate mode comprises a plurality of image groups and each image group comprises consecutive images having the same image content, and wherein at least one of the plurality of image groups is a group of interpolated images and the numbers of images in each image group are close to each other.
An apparatus of frame rate up-conversion configured to receive a current image and a previous image and generate at least one intermediate image, the apparatus comprising:
- a motion vector (MV) detecting circuit for performing forward motion estimation and backward motion estimation to generate a forward MV table, a backward MV table and at least one table of minimum motion estimation (ME) errors according to the current image and the previous image;
- a control circuit for generating a control signal according to the forward MV table, the backward MV table and the at least one table of minimum ME errors;
- a motion compensation circuit for performing corresponding image interpolation in response to the control signal to generate the at least one intermediate image according to the forward MV table, the backward MV table, the current image and the previous image;
- and
- a recovery circuit, the output terminal of the recovery circuit being connected to an input terminal of the MV detecting circuit, the recovery circuit being configured to reconstruct an original film sequence of a pull-down film;
- wherein the control signal is related to one of a high quality mode, at least one intermediate mode and a repeat mode;
- and
- wherein the sequence of the current image and the previous image corresponds to an original film sequence.
Dependencies are inferred from the claim text.