Claims
- 1. A data compression apparatus comprising:
- block separating means for separating input image data included in a signal inputted to the apparatus into blocks each having a predetermined number of successive pixels and outputting a signal including separated data therein;
- predicting means for predicting a code amount of the input image data and outputting a prediction signal including code prediction data therein;
- limiting means for limiting a band of the input image data in correspondence with the code prediction data in the prediction signal outputted from said predicting means and outputting a limited signal including band limited input image data therein;
- transform means for subjecting the band limited input image data in the limited signal outputted from said limiting means to a predetermined orthogonal transform and outputting a transformed signal including transformed data therein;
- quantizing means for quantizing the transformed data in the transformed signal outputted from said transform means and outputting a quantized signal including quantized data therein;
- encoding means for encoding the quantized data in the quantized signal outputted from the quantizing means and outputting encoded quantized data in a plurality of segments; and
- means for controlling said predicting means so that a code amount of each segment of the encoded quantized data outputted from said encoding means is approximately constant, each said segment including a predetermined number of blocks of encoded quantized data.
Priority Claims (3)
Number |
Date |
Country |
Kind |
2-50269 |
Feb 1990 |
JPX |
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2-71096 |
Mar 1990 |
JPX |
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2-71097 |
Mar 1990 |
JPX |
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CROSS-REFERENCES TO RELATED APPLICATIONS
This application is a division of application Ser. No. 08/187,459 filed Jan. 28, 1994, now U.S. Pat. No. 5,542,008 which is a continuation-in-part of application Ser. No. 08/069,469 filed Jun. 1, 1993, now abandoned, which is a continuation of application Ser. No. 07/650,252 filed Feb. 4, 1991, now abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0060694 |
Sep 1982 |
EPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
187459 |
Jan 1994 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
650252 |
Feb 1991 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
69469 |
Jun 1993 |
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