Application Notes Q&A

Question 1. What is the configuration proposed by Faroudja Enterprises for improving video compression?

Digital video compression systems’ efficiency may be improved through the use of a Faroudja pre-processor (prior to compression) and a post-processor (after compression decoding).   The system may include the use of a unique support layer in parallel with the conventional compression path (see below diagram).  The Faroudja scheme complements the conventional compression standards (MPEG-2, MPEG-4, HEVC) and does not require any modifications of the standard codec.

Question 2. What are the advantages of the Faroudja system?

The advantages include:

  1. A bitrate reduction of 35% to 50% for an equivalent image quality.
  2. A significant improvement in image quality with low bitrate content.
  3. Images with two levels of resolution available at the same time.  For example, simultaneous availability of a program in both 1080 lines and 4K resolutions.
  4. Compatibility and flexibility with existing standards.  There will still be a final image if only the pre-processor is used, without the post-processor, or vice versa. In addition, the image will not be lost if the support layer is interrupted.
  5. Compatibility with all line scan rates and frame rates.

Question 3. What is the Faroudja Support Layer?

The Faroudja Support Layer helps provide full resolution with a reduced bit rate.   It can further be configured as a transcoder to help convert video between existing compression formats, such as MPEG-2, H.264, etc., to and from Faroudja’s Support Layer format to save bandwidth, bitrate, or file size in the cloud without sacrificing image quality.

Question 4. What features in addition to bitrate savings are available with the Faroudja process?

  1. It works with any existing compression method.
  2. Transcoding is available between Faroudja’s signals and other existing formats.
  3. It has a user-friendly interface.
  4. It is suitable for a control center with an Ethernet connection.

Question 5. Does the Faroudja process compete with HEVC?

Not at all.  The Faroudja process is compression-standard agnostic.  It applies to all existing standards, from MPEG-2 to HEVC, and reduces the bitrate in all cases.

Question 6. What are the applications of the Faroudja process?

It is aimed at professional markets, such as TV broadcasting stations, cloud-based services, content distribution networks, video conference systems, etc., and wherever there is a critical need for managing large volumes of video data while also delivering a high quality front-of-screen experience.

Question 7.  What is the typical system block diagram with the Faroudja process?

A proposed system block diagram is available below.

Question 8. Is the Faroudja process applicable to the consumer market, such as TVs, cell phones or tablets?

Yes, the algorithms are in place and we have implemented them on a variety of mobile devices through CPU and GPU hardware.

Question 9. What is the complexity of the Faroudja process generally?

The complete process (pre and post) is about as complex as the H.264 compression scheme.  Most of the complexity resides in the Faroudja pre-processor side.

Question 10. What is the delay?

The total delay of the Faroudja process (pre and post-processor) is roughly equal to the delay of an H.264 compression/decompression process.

Question 11. Does the Faroudja process work just with progressive video?

The Faroudja process has been optimized for progressive scan signals.  It will, however, properly function with interlaced video signals with a different optimization.