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Signal transformation device

A signal conversion device and signal transmission technology, which is applied in code conversion, broadcasting devices, digital video signal modification, etc., can solve the problem of temporary stop of action and achieve the effect of preventing temporary stop

Inactive Publication Date: 2006-02-08
KOKUSA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above-mentioned conventional signal conversion device, if the active device and the standby device with different transmission rates and phases are converted, there will be a defect that the operation of equipment such as a digital transmitter at the rear of the signal conversion device will temporarily stop. situation

Method used

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Embodiment Construction

[0020] Next, for the signal conversion device as an implementation example of the present invention, adopt Figure 1~6 Be explained. figure 1 It is a block diagram showing the structure of an MPEG stream generation system as an example of implementation of the signal conversion device of the present invention. 2 and 3 are block diagrams showing the configuration of a TS conversion unit which is one element of the MPEG stream generating system of the present embodiment. FIG. 4 shows the time chart of the TS signal before and after the PCR (Program Clock Reference) correction processing in the MPEG stream generation system of the embodiment example. FIG. 5 is a time chart of TS signals before and after conversion of the transmission rate of the active machine and the standby machine in the MPEG stream generation system of the embodiment example. Figure 6 Shown is the time chart of the TS signal before and after the conversion of the active machine and the standby machine in ...

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Abstract

Matched the transmission rate and phase of an output from an active signal processing unit with the transmission rate and phase of an output from a reserve signal processing unit in a signal conversion apparatus including two kinds of active and reserve signal processing units for applying signal processing of digital compression processing, such as MPEG compression to a video signal. The signal conversion apparatus is provided with: active and reserve storage units which are provided between an active encoder and a switching unit and between a reserve encoder and the switching unit, and write and read video data generated by compressing a video signal, an invalid data storage unit for reading invalid data; and a control unit which reads each of video data at a higher transfer rate than that of writing and performs control to read the invalid data in place of video data stored in the storage units if the video data become less than a predetermined amount.

Description

technical field [0001] The present invention relates to output signal conversion of a signal conversion device having two or more system signal processing units for backup purposes, and more specifically relates to reduction of shock during output signal conversion. The above-mentioned signal processing units are used for video The signal is subjected to digital compression processing such as MPEG (Moving Picture Experts Group) compression. Background technique [0002] Conventionally, broadcasting equipment is configured to have an active unit and a backup unit in order to improve reliability, and when a failure occurs in the active unit, the active unit and the backup unit are switched. An MPEG stream generating system using digital broadcasting as an example of a conventional signal conversion device, that is, a system for MPEG-compressing a video signal from a video camera or the like for digital broadcasting, also has an active unit and a backup unit. Furthermore, it i...

Claims

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Application Information

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IPC IPC(8): H04N7/24H03M7/30H04B1/74H04H1/00H04H20/00H04H20/12H04L29/08H04N5/268H04N5/44H04N7/26H04N19/00H04N19/70
CPCH04N19/147H04N19/87
Inventor 宫下敦
Owner KOKUSA ELECTRIC CO LTD
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