Source adaptive television system

• US 5,187,575 A
• Filed: 12/29/1989
• Issued: 02/16/1993
• Est. Priority Date: 12/29/1989
• Status: Expired due to Term

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Lim, Jae S.
• Primary Examiner(s): Peng, John K.
• Application Number:
  US07/459,289
• Time in Patent Office: 1,145 Days
• Field of Search: 358/140, 358/11, 358/346, 358/141, 358/105, 358/12, 370/112, 370/110.1, 370/111
• US Class Current: 348/558
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 5/46 for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27
• CPC Class Codes: H04N 7/0112 one of the standards corresponding to a cinematograph film standard
• CPC Class Codes: H04N 7/08 Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band , e.g. by time division H04N7/007 takes precedence

Abstract

A new source distinguishing video system which exploits differences between video material originated from different video sources (such as from film or from a video camera). Method and apparatus exploits these different characteristics in an advanced receiver such that video quality can be significantly improved. The invention has a wide variety of applications including design of an improved NTSC system, an improved freeze-frame system, an extended definition television (EDTV) system and a high definition television (HDTV) system, for example.

Claims

1. A television receiver for receiving and decoding a transmitted television signal comprising at least two different classes of source material, the difference between the two classes of source material being a difference in a non-program-content characteristic, wherein the television signal comprises a succession of encoded image frames, and wherein the transmitted television signal has identification information inserted therein indicating the difference in the non-program-content characteristic retained in the encoded image frames, said receiver comprising:

means for receiving said identification information; and

means for using the identification information to process the encoded image frames of said at least two different classes of source material present in the television signal based on said non-program-content characteristic.

2. The television receiver of claim 1 further comprising means for converting the processed encoded image frames to a common display format.

3. The television receiver of claim 1 wherein one of said non-program-content characteristics retained in the encoded image frames is frame rate, so that the frame rate of the encoded image frames if different for the two different classes of source material.

4. The television receiver of claim 1 wherein one of said non-program-content characteristics retained in the encoded image frames is spatial resolution, so that the spatial resolution of the encoded image frames is different for the two different classes of source material.

5. The television receiver of claim 1 wherein one of said non-program-content characteristics retained in the encoded image frames is scanning format.