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Image coding 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04N-007/12
출원번호 US-0943523 (1978-09-18)
발명자 / 주소
  • Schreiber William F. (Cambridge MA) Troxel Donald E. (Belmont MA)
출원인 / 주소
  • Massachusetts Institute of Technology (Cambridge MA 02)
인용정보 피인용 횟수 : 34  인용 특허 : 0

초록

Processing of digitally-coded pictures to improve perceived quality without increasing transmission channel capacity, featuring dividing the video signal into a low, middle and high frequency signals (16, 26), finely quantizing the low frequency signal (18), adding pseudo-random noise (33) to the mi

대표청구항

Apparatus for coding a digital video signal, comprising: first means for processing said signal to produce a low-frequency component representative of luminance variations in a first spatial frequency band, second means for processing said signal to produce a high-frequency component representative

이 특허를 인용한 특허 (34)

  1. Daly Scott J. (W. Henrietta NY) Chen Cheng-Tie (Rochester NY) Rabbani Majid (Rochester NY), Adaptive block transform image coding method and apparatus.
  2. Scott Daly, Bit-depth extension of digital displays using noise.
  3. Daly,Scott J., Bit-depth extension of digital displays via the use of models of the impulse response of the visual system.
  4. Takamizawa, Yuichiro, Bit-rate converting apparatus and method thereof.
  5. Brien J. Housand ; Gene D. Tener ; Susan J. Jesse ; William A. Pearson ; G. Edward Newberg ; John F. Weaver ; Timothy A. Hill ; Helmuth Bauer ; Bhikhubbai L. Patel ; Ward D. Robertson ; Joh, Combined laser/FLIR optics system.
  6. Hurst Robert N. (Cherry Hill NJ), Compatible HDTV with increased vertical and horizontal resolution.
  7. Oakley Charles B. (Princeton NJ) Dischert Robert A. (Burlington NJ), Compatible television system with increased vertical resolution.
  8. Schreiber William F. (Cambridge MA), Definition television systems.
  9. Lippman Andrew B. (Salem MA) Adelson Edward H. (Cambridge MA) Butera William J. (Arlington VA), Extended definition television systems.
  10. Schreiber William F. (Cambridge MA), High definition television system.
  11. Matama Tohru,JPX, Image processing method and apparatus for reducing the effect of image information having perceptible film graininess.
  12. Pan, Yichuan; Broschart, Mark; Fellingham, Peter J.; Grady, Timothy T., Ink jet printhead quality management system and method.
  13. David A. Purcell ; Richard A. Murray ; Dan J. Dull, Intelligent printer components and printing system.
  14. Purcell David A. ; Murray Richard A. ; Dull Dan J., Intelligent printer components and printing system.
  15. Cassereau Philippe M. (Nashua NH), Method and apparatus for coding motion pictures utilizing motion compensation.
  16. Wilkinson James H. (Tadley near Basingstoke GB2), Method and apparatus for decoding and recording composite digital television signals to prevent degradation of the signa.
  17. Galand Claude (Cagnes sur Mer FRX) Furlan Gilbert (Roquebrune Cap Martin FRX) Lancon Emmanuel (Nice FRX) Menez Jean (Cagnes sur Mer FRX), Method and apparatus for subband coding images.
  18. Cheng, Yi-Jen, Method and apparatus for testing eye diagram characteristics.
  19. Dunbar Brion, Method and apparatus for video signal sharpening.
  20. Scott J. Daly ; Shawmin Lei, Method for non-uniform quantization in a resolution hierarchy by transmission of break points of a nonlinearity.
  21. Scott J. Daly, Method for non-uniform quantization in a resolution hierarchy by use of a nonlinearity.
  22. Chiariglione Leonardo (Villar Dora ITX) Guglielmo Mario (Montalenghe ITX), Method of and system for coding a two-dimensional data array.
  23. Shimura Kazuo (Kanagawa JPX), Method of compressing image signals.
  24. Martucci,Stephen A.; Elton,John H., Methods and apparatus for improving quality of block-transform coded images.
  25. Martucci,Stephen A.; Elton,John H., Methods and apparatus for improving quality of block-transform coded images.
  26. Sakazume, Satoru; Shimauchi, Kazuhiro; Kumakura, Toru; Ueda, Motoharu, Moving-picture layered coding and decoding methods, apparatuses, and programs.
  27. Catros, Jean-Yves, Process and system for the compression of the flow rate of data transmitted between at least a television transmitter and a television receiver.
  28. Richard Christian (Noyal sur Vilaine FRX), Process for the adaptative coding and the decoding of a television picture and devices for performing this process.
  29. Okamura,Jun ichi; Tsujita,Tatsuo, Semiconductor integrated circuit for realizing coding circuit.
  30. Ohuchi Satoshi,JPX ; Takahashi Sadao,JPX, Spatial-filtering unit for performing adaptive edge-enhancement process.
  31. Citta Richard W. (Oak Park IL) Lee Ronald B. (Chicago IL), TV signal transmission systems and methods.
  32. Martens Jean B. O. S. (Eindhoven NLX), Television transmission system including a pyramidal coding/decoding circuit.
  33. Citta Richard W. (Oak Park IL) Mutzabaugh Dennis M. (Mt. Prospect IL), Transmission of a video signal using adaptive delta modulation.
  34. Sugiyama Kenji,JPX, Video coder/decoder which separately processes high and low frequencies.
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