Image coding apparatus
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United States of America Patent
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Mar 4, 1997
Grant Date -
N/A
app pub date -
Sep 30, 1994
filing date -
Oct 6, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An image coding apparatus wherein coding processing is performed efficiently and the generated code amount is controlled to a substantially fixed level is disclosed. The image coding apparatus comprises a setting circuit for setting a coding parameter, a coding circuit for coding input image data using the coding parameter, a code amount measurement circuit for measuring the amount of codes generated by the coding circuit, an aimed code amount setting circuit for setting an aimed code amount, a calculation circuit for calculating a code amount difference between the aimed code amount and the generated code amount, and a coding parameter control apparatus for controlling the coding parameter of the setting circuit in accordance with the code amount difference such that the setting circuit first sets an initial value as the coding parameter and then sets, in accordance with the code amount difference calculated from the amount of codes newly generated using the initial value, another value as the coding parameter to be used for next coding for the same image data.
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