Television – Format conversion – Line doublers type
Reexamination Certificate
1999-06-17
2003-04-01
Miller, John (Department: 2614)
Television
Format conversion
Line doublers type
C348S451000, C348S448000, C348S699000
Reexamination Certificate
active
06542197
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a digital signal processor, and more particularly, to a three-dimensional signal processor using motion information during decoding of an image signal, for performing three-dimensional signal processing such as double scan/progressive scan conversion of a digital broadcasting signal, using a motion vector included in a decoded signal such that a special motion detecting block is not required.
2. Description of the Related Art
As shown in
FIG. 1
, in a signal processor having a decoding block
100
A and a three-dimensional signal processing block
100
B, a digital broadcasting signal according to the prior art is input to a digital signal receiver
11
via a transmission path (not shown). The digital signal receiver
11
performs channel coding of the digital signal for correcting errors introduced by the transmission path, and outputs a bit stream.
A digital signal decoder
12
performs source decoding for restoring an image signal, with respect to the error-corrected digital bit stream. In the source decoding process for restoring the image signal, it is determined from which portion of a previously processed picture image information should be brought in order to get the image information of a current macro_BLOCK, according to the motion information of a signal extracted by a motion information extractor
18
. Data is read from a decoding memory
13
using the above-determined previous picture portion to perform forward prediction or bidirectional prediction, thereby restoring the image signal.
When 3-dimensional signal processing such as progressive scan conversion, double scan conversion, or the like is performed to improve the image quality of a restored image signal, movement is detected by a motion detection memory
16
, and an algorithm for three-dimensional signal processing or how to apply a filter coefficient upon three-dimensional signal processing is determined. According to the above result of determination, corresponding three-dimensional signal processing is executed by a three-dimensional signal processing unit
14
associated with memory
15
. This three-dimensional signal processed signal is finally converted into analog R, G, and B signals and displayed by a digital-to-analog (D/A) conversion and display unit
17
.
According to the prior art as described above, in order to perform three-dimensional signal processing, the motion information of an image signal is detected using a special memory, and time base interpolation is adaptively performed according to the detected motion information. The motion detection requires a field/frame memory, thus increasing manufacturing costs. Also, motion detection information according to the prior art is not accurate, so that partial image quality degradation of an image signal occurs during the interpolation of a signal due to limitations in the capacity of a memory or the like.
SUMMARY OF THE INVENTION
To solve the above problems, it is an objective of the present invention to provide a three-dimensional signal processor using motion information extracted during decoding of an image signal, for extracting motion information using a motion vector transmitted from a transmitter and performing three-dimensional signal processing using the extracted motion information.
Accordingly, to achieve the above objective, there is provided a three-dimensional signal processor using motion information extracted during the decoding of an image signal, for performing three-dimensional signal processing on an image signal received from a digital decoder, the processor comprising: a motion information extractor for extracting motion information from a transmitted motion vector when the digital decoder is decoding; and a three-dimensional signal processing unit for performing three-dimensional signal processing using motion information extracted by the motion information extractor.
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Desir Jean W.
Miller John
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
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