Method and apparatus for receiving video

• US 9,756,305 B2
• Filed: 02/27/2015
• Issued: 09/05/2017
• Est. Priority Date: 12/16/2014
• Status: Active Grant

• Current Assignee: NextChip Co., Ltd.
• Original Assignee: NextChip Co., Ltd.
• Inventors: Kim, Do Kyun, Song, Jin Gun
• Primary Examiner(s): Harold, Jefferey F
• Assistant Examiner(s): Rahman, Mustafizur
• Application Number:
  US15/031,916
• Publication Number:
  US 20160337627A1
• Time in Patent Office: 921 Days
• Field of Search: 348457, 348441, 348443, 348445, 348469, 348470, 348471, 348473, 348474, 348478, 348479, 348489, 348493, 348547, 348572, 348573, 348651, 348661, 348665, 348667, 348712, 348719, 348370, 3483961, 3483981, 3483921, 3483991, 348234, 348235, 348258, 348269, 348 68, 348 70, 345690, 345589, 345591, 345593, 345604
• CPC Class Codes: H04N 11/28 involving bandwidth reduction, e.g. subsampling
• CPC Class Codes: H04N 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 21/42607 for processing the incoming bitstream
• CPC Class Codes: H04N 5/44 Receiver circuitry for the reception of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 7/0102 involving the resampling of the incoming video signal
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source
• CPC Class Codes: H04N 9/64 Circuits for processing colour signals H04N9/77 takes precedence; camera processing pipelines for processing colour signals H04N23/84
• CPC Class Codes: H04N 9/642 Multi-standard receivers
• CPC Class Codes: H04N 9/78 for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

Abstract

Provided is a method and apparatus for converting, to a digital video signal, an analog video signal capable of having a variety of resolutions. A video reception apparatus determines a format of an analog video signal by sampling the analog video signal. The video reception apparatus converts the analog video signal to a digital video signal based on the determined format. A comb filter is used to separate a color difference signal and a luminance signal from the digital video signal, and the digital video signal is reconfigured using the luminance signal and the color difference signal.

Claims

1. A method of receiving a video, the method comprising:

receiving an analog video signal;

adaptively determining a format of the analog video signal based on the analog video signal, wherein the determining of the format comprises;

sampling the analog video signal at a preset sampling frequency;

determining the format of the analog video signal based on the number of sampled vertical lines and the number of horizontal samples, the number of sampled vertical lines and the number of horizontal samples correspond to the format among a plurality of the formats; and

resetting the sampling frequency corresponding to the determined format as s basic sampling frequency,

converting the analog video signal to a digital video signal using the reset sampling frequency corresponding to the determined format;

separating the digital video signal into a luminance signal and a color difference signal using an adaptive comb filter; and

reconfiguring the digital video signal based on the luminance signal and the color difference signal.

2. The method of claim 1, wherein the comb filter is adaptively adjusted based on a burst frequency corresponding to the determined format.

3. The method of claim 1, further comprising

removing noise from at least one of the luminance signal and the color difference signal.

4. The method of claim 3, wherein the removing of the noise comprises removing the noise using a low pass filter.

5. The method of claim 1, wherein the preset sampling frequency is 74.25 MHz.

6. The method of claim 1, wherein the determining of the format further comprises determining a burst frequency corresponding to the determined format, and

the comb filter is adaptively adjusted based on the burst frequency.

7. The method of claim 1, wherein the reconfiguring of the digital video signal comprises reconfiguring the digital video signal by merging the color difference signal and the luminance signal.

8. The method of claim 7, wherein the merging indicates alternately merging a sample of the color difference signal and a sample of the luminance signal.

9. The method of claim 7, wherein the reconfiguring of the digital video signal comprises reconfiguring the digital video signal as embedded data based on the color difference signal and the luminance signal.

10. The method of claim 1, wherein the determining of the format comprises determining a burst frequency corresponding to the determined format, and

the separating comprises adjusting the comb filter based on the burst frequency.

11. A video reception apparatus comprising:

a communicator configured to receive an analog video signal; and

a processor configured to adaptively determine a format of the analog video signal based on the analog video signal, to convert the analog video signal to a digital video signal using a sampling frequency corresponding to the determined format, to separate the digital video signal into a luminance signal and a color difference signal using an adaptive comb filter, and to reconfigure the digital video signal based on the luminance signal and the color difference signal,

wherein the processor is configured to sample the analog video signal at a preset sampling frequency, to determine the format of the analog video signal based on the number of sampled vertical lines and the number of horizontal samples the number of sampled vertical lines and the number of horizontal samples correspond to the format among a plurality of the formats, and to reset the sampling frequency corresponding to the determined format as a basic sampling frequency.

12. The video reception apparatus of claim 11, wherein the comb filter is adaptively adjusted based on a burst frequency corresponding to the determined format.

13. The video reception apparatus of claim 11, wherein the processor is configured to determine a burst frequency corresponding to the determined format, and

the comb filter is adaptively adjusted based on the burst frequency.

14. The video reception apparatus of claim 11, wherein the processor is configured to reconfigure the digital video signal by merging the color difference signal and the luminance signal.

15. The video reception apparatus of claim 14, wherein the merging indicates alternately merging a sample of the color difference signal and a sample of the luminance signal.

16. The video reception apparatus of claim 14, wherein the processor is configured to reconfigure the digital video signal as embedded data based on the color difference signal and the luminance signal.

17. The video reception apparatus of claim 11, wherein the processor is configured to determine a burst frequency corresponding to the determined format, and to adjust the comb filter based on the burst frequency.