Television signal processor that is operable to generate a television signal from broadcast waves with a plurality of different broadcast standards
a television signal and signal processor technology, applied in the field of television signal processors, can solve the problems of high cost, complex structure, and inability to recognize the signal processor, and achieve the effect of generating the television signal at the proper timing, combining the video data, the osd data and the additional information
Inactive Publication Date: 2008-12-16
PANASONIC CORP
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- Application Information
AI Technical Summary
Benefits of technology
Enables proper timing and cost-effective processing of video, OSD, and additional information even when the broadcast wave standard changes, simplifying the structure and improving adaptability.
Problems solved by technology
This results in a complicated structure and a higher cost.
Consequently, if the standard of the received digital broadcast wave is different from the previously planned standard, the conventional television signal processor cannot recognize such change, and accordingly cannot combine the video data, the OSD data and the additional information at proper timing.
Method used
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Embodiment Construction
[0045]FIG. 1 shows a block diagram which is an example of a set top box comprising a television signal processor according to an embodiment of the present invention. Referring to FIG. 1, an antenna 1 receives digital broadcast waves. A frequency selection part 2 selects any broadcast wave of a specific frequency from the broadcast waves received in the antenna 1, and outputs the same to a demodulating part 3. The demodulating part 3 demodulates the broadcast wave selected by the frequency selection part 2, and outputs the same to a transport decoder 4. In the signal demodulated by the demodulating part 3, a video stream, an audio stream, additional information, and other types information are multiplexed in a time-divisional manner. The signal outputted by the demodulating part 3 is called a transport stream. In the transport stream, the transport decoder 4 respectively separates the video stream, the audio stream, the additional information and other types of information which are ...
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In an effective display area, an additional information recognizing part 203 recognizes a standard of a broadcast wave, refers to a ROM 212 and selects a target value, and provides an internal clock of a video data reading part 205 and an internal clock of an OSD data reading part 206 with the target value. At a retrace internal, on the other hand, the additional information recognizing part 203 notifies an additional information synthetic position deciding part 210 of the standard of the broadcast wave. The additional information synthetic position deciding part 210 selects from a ROM 211 a target value for reading the additional information applicable to the notified standard, and outputs the target value to an additional information reading parts 207. When the standard of the broadcast wave is changed, target values corresponding to the changes are responsively selected from the ROM 212 and the ROM 211.
Description
[0001]This application is a divisional reissue application of Ser. No. 10 / 659,683, filed Sep. 11, 2003, which is a reissue application of U.S. Pat. No. 6,288,750, issued Sep. 11, 2001.TECHNICAL FIELD[0002]The present invention relates to television signal processors, and more specifically to a television signal processor processing a received broadcast wave and generating a television signal.BACKGROUND ART[0003]In recent years, due to digitalization of television broadcasting, various needs or services which have been beyond imagination in general broadcasting are beginning to emerge. As to a channel which only broadcasts movie programs, for example, a technology of copy guard is important to protect a copyright so as not to allow an unlimited copy on the receiver. Recently, therefore, it was proposed to multiplex information such as copy guard into a digital broadcast wave as additional information and to carry the copy guard in the wave so as to allow the receiver to utilize the s...
Claims
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IPC IPC(8): H04N5/445H04N9/74H04N5/44H04N5/46H04N21/485
CPCH04N5/445H04N5/46H04N21/42692H04N21/431H04N21/4348H04N21/434H04N21/47H04N21/426H04N21/43074
InventorYAMADA, MIKIHIKOUEHARA, HIROTOSHI
OwnerPANASONIC CORP