University of Hertfordshire

By the same authors

A new SoC video ghost canceller

Research output: Chapter in Book/Report/Conference proceedingConference contribution


  • 904029

    Final published version, 1.17 MB, PDF document

  • J. Huang
  • Y. He
  • Y. Sun
  • W. Zhao
  • X. Zhu
View graph of relations
Original languageEnglish
Title of host publicationProcs of 52nd IEEE Int Midwest Symposium on Circuits & Systems
ISBN (Print)978-1-4244-4480-9
Publication statusPublished - 2009


A video ghost canceller, which reduces the effect of multi-path signal echoes (ghosts), is described in this paper. An adaptive LMS algorithm was used to improve the received image quality of PAL or NTSC broadcasts. The internal 576-tap digital filter, which is comprised of a 144-tap FIR and a 430-tap IIR filter, cancels ghosts occurring from -6.15 muS before to +41.6 muS after the main signal. In order to reduce the chip area occupied by the filter, an algorithm that combines the error threshold and the error accumulation methods is applied for reducing the coefficients word-length. Also, a tap-decimated equalizer is proposed, which can greatly reduce the number of the multipliers in the adaptive filter. The system on chip (SoC) device performs all the functions required for ghost cancellation, eliminating the need for external DSP controllers, memory, sync detection, D/A converters, A/D converters, and user programming. From chip tests, the canceller can remove the ghost whose power is lower than -6 dB compared to that of the main signal and make ghost residue down to -40 dB. When operating at a rate of 14.318 MHz (4 Fsc), it dissipates 1.3 W from a 3.3 V power supply.


“This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder." “Copyright IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.” DOI: 10.1109/MWSCAS.2009.5235936

ID: 510497