[go: up one dir, main page]

CA2158143A1 - Resampling apparatus suitable for resizing a video image - Google Patents

Resampling apparatus suitable for resizing a video image

Info

Publication number
CA2158143A1
CA2158143A1 CA002158143A CA2158143A CA2158143A1 CA 2158143 A1 CA2158143 A1 CA 2158143A1 CA 002158143 A CA002158143 A CA 002158143A CA 2158143 A CA2158143 A CA 2158143A CA 2158143 A1 CA2158143 A1 CA 2158143A1
Authority
CA
Canada
Prior art keywords
derived
digital
sample stream
stream
sampling period
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002158143A
Other languages
French (fr)
Other versions
CA2158143C (en
Inventor
James Henry Arbeiter
Roger Frank Bessler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NORTHSHORE LABORATORIES Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CA 2158143 priority Critical patent/CA2158143C/en
Priority claimed from PCT/US1993/003490 external-priority patent/WO1994024632A1/en
Publication of CA2158143A1 publication Critical patent/CA2158143A1/en
Application granted granted Critical
Publication of CA2158143C publication Critical patent/CA2158143C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
    • G06T3/4007—Scaling of whole images or parts thereof, e.g. expanding or contracting based on interpolation, e.g. bilinear interpolation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Systems (AREA)

Abstract

A digital resampler comprises a combination of first means and second means.
The first means, which includes interpolation filter means, is responsive to the digital-signal sample values of an input sample stream for producing a first derived sample stream of digital--signal sample values in which the given sampling period P of the input stream is multiplied directly by a factor equal to M'/CL, where C
is a given positive integer and M' is smaller than CL, either 2n(M'/CL) or 2-n(M'/CL) is equal to M/L and the absolute value of n is at least equal to zero, so that the sampling period of the first derived sample stream is (M'/CL)P. The second means, which includes octave prefiltering and sample means, is responsive to the first derived sample stream of digital-signal sample values for producing as an output a second derived sample stream of digital-signal sample values in which the first derived sampling period (M'/CL)P of the first derived sample stream is multiplied by a factor equal to either 2n(M'/CL) or 2-n(M'/CL), so that the sampling period of the second derived sample stream is (M/L)P.
CA 2158143 1993-04-14 1993-04-14 Resampling apparatus suitable for resizing a video image Expired - Fee Related CA2158143C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2158143 CA2158143C (en) 1993-04-14 1993-04-14 Resampling apparatus suitable for resizing a video image

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1993/003490 WO1994024632A1 (en) 1993-04-14 1993-04-14 Resampling apparatus suitable for resizing a video image
CA 2158143 CA2158143C (en) 1993-04-14 1993-04-14 Resampling apparatus suitable for resizing a video image

Publications (2)

Publication Number Publication Date
CA2158143A1 true CA2158143A1 (en) 1994-10-27
CA2158143C CA2158143C (en) 2007-09-18

Family

ID=4156591

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2158143 Expired - Fee Related CA2158143C (en) 1993-04-14 1993-04-14 Resampling apparatus suitable for resizing a video image

Country Status (1)

Country Link
CA (1) CA2158143C (en)

Also Published As

Publication number Publication date
CA2158143C (en) 2007-09-18

Similar Documents

Publication Publication Date Title
EP0665696B1 (en) TV camera with digital video signal processing device
EP0687112A3 (en) Image conversion apparatus
AU7736994A (en) Digital image resizing apparatus
EP0651568A3 (en) Signal processing apparatus for converting a scanning line number of a television signal
KR920017489A (en) Color television camera device and signal generation method thereof
CA2158143A1 (en) Resampling apparatus suitable for resizing a video image
EP0716549A4 (en) Digital video camera device and aspect ratio converting device
US6606423B2 (en) Image format converting method and apparatus
EP0818740A3 (en) Signal interpolation and decimation exploiting filter symmetry
CA2052770A1 (en) Method and apparatus for selective reduction of upper harmonic content and digital synthesizer excitation signals
NO954078L (en) Scanner for changing the size of a video image
CN1025405C (en) Digital interpolation circuitry
JPH03297277A (en) Signal processing unit
EP0546469B1 (en) Method and apparatus for vertical interpolation
JPS6346881A (en) Digital outline correcting circuit
JPS5617578A (en) Coordinate converting system for picture signal
JP3091358B2 (en) Television camera equipment
EP0382151A3 (en) Sampling frequency down-converting apparatus and sampling frequency up-converting apparatus
JPH03266565A (en) Cyclic noise reducer
EP0567319A2 (en) Scanning line converting method for a television receiver and device thereof
KR100275902B1 (en) Apparatus of converting image
JPH074023B2 (en) TV image enlargement method
JPS61225987A (en) Still picture transmission system
JPS6310892A (en) Vertical contour correction device
KR970014299A (en) Wide 16: 9 display of 4: 3 television signal with digital sampling rate conversion

Legal Events

Date Code Title Description
EEER Examination request
FZDC Discontinued application reinstated
MKLA Lapsed