Inverse discrete-cosine transform apparatus
An inverse discrete-cosine transform apparatus that is simple in structure and can yet output pixel data items different in resolution. The apparatus comprises eight inverse discrete-cosine transform multipliers 23 , ten field, compression, inverse discrete-cosine transform multipliers 22 , eight se...
Gespeichert in:
Hauptverfasser: | , , , , |
---|---|
Format: | Patent |
Sprache: | eng |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | An inverse discrete-cosine transform apparatus that is simple in structure and can yet output pixel data items different in resolution. The apparatus comprises eight inverse discrete-cosine transform multipliers
23
, ten field, compression, inverse discrete-cosine transform multipliers
22
, eight selectors
24
, eight selectors
25
, eight buffers
26
, eight sign multipliers
27
, a control section, eight adders
28
, and eight buffers
29
. The control section controls the selectors
24
, selectors
25
, buffers
26
and sign multipliers
27
in accordance with whether the input discrete-cosine block has been subjected to field division and where the discrete-cosine coefficients are located in the block. One of the values input to the selectors
24
, selectors
25
, buffers
26
and sign multipliers
27
is thereby selected. The value selected is output after added with the plus sign or the minus sign. The adders
28
add the values output from the selectors
24
, selectors
25
, buffers
26
and sign multipliers
27
. The buffers
29
store the values output from the adders
28. |
---|