JPS6428070U

JPS6428070U -

Info

Publication number: JPS6428070U
Application number: JP12279187U
Authority: JP
Priority date: 1987-08-11
Filing date: 1987-08-11
Publication date: 1989-02-17

Description

[Brief explanation of the drawing]

第１図はこの考案にかかるビデオプリオンタの
一実施例の構成を示すブロツク図、第２図は第１
図におけるメモリ制御回路１１の構成を示すブロ
ツク図、第３図はフレーム画印刷モードが選定さ
れた場合のタイミングチヤートを示す図、第４図
はフイールド画印刷モードが選定された場合のタ
イミングチヤートを示す図、第５図は本実施例の
ビデオプリンタにより印刷された画像を示す図、
第６図は従来のビデオプリンタの構成を示すブロ
ツク図、第７図ａは奇数フイールドの画像を示す
図、同図ｂは偶数フイールドの画像を示す図、第
８図ａはフイールドメモリ６の記憶エリアの構成
を示す図、同図ｂはフイールドメモリ２の記憶エ
リアの構成を示す図、第９図はサーマルヘツド１
０およびサーマルヘツド駆動回路９の構成を示す
図、第１０図は従来のビデオプリンタにより印刷
された画像を示す図である。１……Ａ／Ｄ変換器、２……同期分離回路、３
……モード切換スイツチ（モード選択手段）、４
……ＣＰＵ、６，７……フイールドメモリ、８…
…印刷制御回路、９……サーマルヘツド駆動回路
、１０……サーマルヘツド（以上８，９，１０は
印刷手段）、１１……メモリ制御回路、１２……
セレクタ制御回路、１３……セレクタ（以上１２
，１３は読み出し選択手段）。 FIG. 1 is a block diagram showing the configuration of an embodiment of the video pre-onter according to this invention, and FIG.
3 is a block diagram showing the configuration of the memory control circuit 11 in the figure. FIG. 3 is a timing chart when frame image printing mode is selected. FIG. 4 is a timing chart when field image printing mode is selected. FIG. 5 is a diagram showing an image printed by the video printer of this embodiment,
6 is a block diagram showing the configuration of a conventional video printer, FIG. 7a is a diagram showing an image of an odd field, FIG. 7b is a diagram showing an image of an even field, and FIG. Figure 9 shows the configuration of the storage area of the field memory 2. Figure 9 shows the configuration of the storage area of the field memory 2.
FIG. 10 is a diagram showing an image printed by a conventional video printer. 1...A/D converter, 2...Synchronization separation circuit, 3
...Mode selection switch (mode selection means), 4
...CPU, 6, 7...Field memory, 8...
...Print control circuit, 9...Thermal head drive circuit, 10...Thermal head (8, 9, and 10 are printing means), 11...Memory control circuit, 12...
Selector control circuit, 13...selector (above 12
, 13 is a reading selection means).

Claims

[Scope of utility model registration request]

In a video printer that makes a hard copy of a television screen using an interlaced scanning video signal,
first and second field memories each storing one field of image information obtained by quantizing a luminance signal; mode selection means for selecting either a field mode or a frame mode; and a write and read address of the field memory. When a frame mode is selected by the specified memory control circuit and the mode selection means, each image information in the first and second field memories is outputted one data at a time from the first and second field memories alternately. On the other hand, when the field mode is selected, readout selection means outputs each image information of either the first or second field memory twice, and the readout selection means outputs each image information twice. 1. A video printer comprising: printing means for printing based on the image information obtained.