Methods and apparatus for generating a picture-in-picture digital television frame by inserting a mean-only frame into a full-size frame
First Claim
1. An encoding/decoding method for generating a picture-in-picture digital television frame, comprising the steps of:
- (a) converting a first analog television signal into a first digital frame comprising a first prescribed number of pixels;
(b) deriving a mean-only frame from said first digital frame, said mean-only frame comprising a second prescribed number of pixels, wherein each of said second prescribed number of pixels represents an average of a corresponding group of pixels in said first digital frame;
(c) subtracting said mean-only frame from said first digital frame and performing Vector Quantization;
of the first digital frame having said mean-only frame subtracted therefrom, said first digital frame having said mean-only frame subtracted therefrom, in combination with said mean-only frame, being convertible to a full-size frame;
(d) creating an insertion frame on the basis of said mean-only frame;
(e) performing digitalization, mean removal and Vector Quantization or statistical coding on a second analog television signal to convert said second analog television signal into a second digital frame comprising a third prescribed number of pixels; and
(f) inserting said insertion frame into said second digital frame, thereby generating a picture-in-picture digital television frame.
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Accused Products
Abstract
A method for generating a picture-in-picture digital television frame comprises the steps of: converting a first analog television signal into a first digital frame comprising a first prescribed number of pixels; deriving a mean-only frame from the first digital frame, the mean-only frame comprising a second prescribed number of pixels; creating an insertion frame on the basis of the mean-only frame; and inserting the insertion frame into a second digital frame, thereby generating a picture-in-picture digital television frame. A Vector Quantization receiver/decoder comprises a mean-only decode section 20, a full decode section 30, and an image inserter 40.
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Citations
12 Claims
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1. An encoding/decoding method for generating a picture-in-picture digital television frame, comprising the steps of:
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(a) converting a first analog television signal into a first digital frame comprising a first prescribed number of pixels; (b) deriving a mean-only frame from said first digital frame, said mean-only frame comprising a second prescribed number of pixels, wherein each of said second prescribed number of pixels represents an average of a corresponding group of pixels in said first digital frame; (c) subtracting said mean-only frame from said first digital frame and performing Vector Quantization;
of the first digital frame having said mean-only frame subtracted therefrom, said first digital frame having said mean-only frame subtracted therefrom, in combination with said mean-only frame, being convertible to a full-size frame;(d) creating an insertion frame on the basis of said mean-only frame; (e) performing digitalization, mean removal and Vector Quantization or statistical coding on a second analog television signal to convert said second analog television signal into a second digital frame comprising a third prescribed number of pixels; and (f) inserting said insertion frame into said second digital frame, thereby generating a picture-in-picture digital television frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11)
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9. A decoding method for decoding first and second compressed streams of television data and creating a picture-in-picture television image, comprising the steps of:
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(a) receiving a first compressed stream comprising mean data for Y, U and V components (Y1, U1, V1) of a first television image and decoding said Y1, U1, V1 components into a first mean-only image 1/N2 times the size of a corresponding full-size image, wherein N2 represents the number of full-size image pixels employed to derive each first mean-only image pixel; (b) receiving a second compressed stream comprising mean dam for Y, U and V components (Y2, U2, V2) of a second television image and mean-removed residual data for said second television signal, and decoding said Y2, U2, V2 components into mean-only image data and combining said mean-only image data with said residual data to form a full-size image corresponding to said second television image; and (c) inserting said first mean-only image into said full-size image to form a picture-in-picture television image; wherein said mean-only images are composed of pixels representing an average of a corresponding group of full-size image pixels. - View Dependent Claims (10, 12)
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Specification