Method and apparatus for processing a plurality of format types of video signals which include closed-caption data

• US 7,139,032 B2
• Filed: 04/23/2003
• Issued: 11/21/2006
• Est. Priority Date: 10/08/1999
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Unemura, Toyoaki
• Primary Examiner(s): LEE, MICHAEL
• Application Number:
  US10/420,916
• Publication Number:
  US 20030193615A1
• Time in Patent Office: 1,308 Days
• Field of Search: 348/405, 348/468, 348/465, 348/705, 348/706, 348/563, 348/564, 348/554, 348/558, 348/555, 348/556
• US Class Current: 348/555
• CPC Class Codes: H04N 21/4884 for displaying subtitles
• CPC Class Codes: H04N 5/445 for displaying additional information H04N5/50 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 7/035 Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal
• CPC Class Codes: H04N 7/0885 for the transmission of subtitles

Abstract

In a display apparatus (PI) displaying a closed-caption (Scc, DS) multiplexed in the first and second component video signals (Scv1: Y, PB, and PR, Svc2: Y and C) received from externally provided video signal sources, a video signal selector (7) selects one of said first and second component video signals (Scv1, Scv2); a closed-caption extractor (3) extracts the closed-caption (Scc, DS) from said selected one of first and second component video signals (Scv1, Scv2); and a controller (10) controls the closed-caption extractor (3) based on the format type of the selected first and second component video signals (Scv1 and Scv2).

Claims

1. Apparatus for processing at least a component video signal and a composite video signal which include closed-caption data, said apparatus comprising:

component video signal receiving means for receiving said component video signal as a first component video signal;

composite video signal receiving means for receiving said composite video signal to produce a second component video signal;

selection means for selecting one of said first and second component video signals;

closed-caption extraction means for extracting said closed-caption data from said selected one of first and second component video signals;

control means for controlling said closed-caption extraction means based on a format type of said selected one of first and second component video signals; and

video format determination means for determining a video format type of said first component video signal based on a luminance signal thereof when said first component video signal is selected, wherein

said control means controls said closed-caption extraction means based on said determined video format type.

2. Apparatus according to claim 1, wherein

said control means enables said closed-caption extraction means when said second component video signal is selected.

3. Apparatus according to claim 1, wherein

said control means enables said closed-caption extraction means only when said determined video format type is NTSC.

4. Apparatus according to claim 1, wherein said video format determination means comprise:

synchronizing extraction means for extracting a horizontal synchronization signal and a vertical synchronization signal from said luminance signal;

video signal format storing means for storing discrimination data discriminating each of said plurality of video formats; and

determination means for comparing said extracted horizontal and vertical signals with said discrimination data to determine a video format type of said first component video signal.