EP0444947A2
Expired / Lapsed
EP
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Improved definition television
Assignee: Texas Instruments Inc
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Filing: 1991-03-01
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Granted: —
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Expires: 2011-03-01
Abstract
Abstract A television receiving system includes a digital unit (50b) which has at least one single-instruction multiple-data processor (50a), especially suited for television processing. The processor (50a) receives data samples of each horizontal line word-serially, but processes the line in parallel. The processor (50a) has input, computational, and output layers (11-16) that operate concurrently. Internal register files (R0,R1) emulate line memory to eliminate the need for external line memories. The processor (50a) may be programmed with various improved definition television tasks, downloaded to it from a host development system.
Inventors
- 👤 Hiroshi Miyaguchi
- 👤 Jimmie D. Childers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:17
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/4448; H04N5/14; H04N5/144; H04N5/20; H04N5/205; H04N5/208; H04N5/445; H04N5/45; H04N7/00; H04N7/01; H04N7/0117; H04N7/012; H04N9/00; H04N9/64; H04N9/646; H04N9/77; H04N9/78
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
147 words
A digital processing unit for use in a television receiver for providing an improved television signal from data samples of a standard television signal, characterized by: a single-instruction multiple-data processor for processing said data samples, wherein said processor has a number of processing elements corresponding to the number of said data samples, and wherein said processor receives a packet of said data samples representing a line of said television picture word-serially, and wherein said processor operates on said line of data samples in parallel; a plurality of field memories for providing data samples representing delayed fields of said television picture to said processor; a control unit for providing control and timing signals to said processor; an instruction generator for providing instructions to said processor; and memory for storing instructions used by said processor, wherein said memory is programmed with instructions for improving the quality of said picture.
Claim 2
Dependent Claim
27 words
The digital processing unit of Claim 1 further characterized by said memory having instructions for spatial and temporal digital filtering for improving the quality of said picture.
Claim 3
Dependent Claim
18 words
The digital processing unit of Claim 1, wherein said memory is further programmed with a motion detection process.
Claim 4
Dependent Claim
44 words
A digital processing unit as set forth in Claim 1 further characterized by: a plurality of multiplexers for selecting whether data flow into said processor is unprocessed data or processed data fed back to said multiplexer, in response to a still mode selection signal.
Claim 5
Dependent Claim
29 words
The digital processing unit of Claim 4, wherein a first multiplexer is interposed in a luminance data path and a second multiplexer is interposed in a chrominance data path.
Claim 6
Dependent Claim
50 words
The digital processing unit of Claim 4, comprising more than one of said processors and wherein for each of said additional processors, one of said multiplexers is interposed between said field memories and said processor such that each processor receives the same data in response to a still mode signal.
Claim 7
Dependent Claim
53 words
A digital processing unit as set forth in Claim 1 further characterized by: a second control unit for providing control and timing signals to said processor for controlling a sub-picture display; and a plurality of multi-screen mode multiplexers for providing sub-picture data to said processor, in response to a multi-screen mode selection signal.
Claim 8
Dependent Claim
38 words
The digital processing unit of Claim 7, wherein said multi-screen multiplexers direct pre-processed data to sub-picture field memory, and wherein said sub-picture field memory receives control signals from said second controller for reducing the size of said picture.
Claim 9
Dependent Claim
38 words
The digital processing unit of Claim 1, wherein there is more than one of said processors, each having an associated instruction generator, and wherein an additional multi-screen multiplexer provides the same sub-picture data to each of said processors.
Claim 10
Dependent Claim
83 words
The digital processing unit of Claim 1, further characterized by: an analog to digital unit for converting a received standard television transmission signal to generate a signal having digital picture samples; said processor for processing the samples to produce a processed signal; a digital to analog circuit for receiving and converting said processed signal to an analog signal; a display unit for receiving said analog signal and generating picture signals; and a display for receiving said picture signals and displaying said picture signals.
Claim 11
Independent Claim
128 words
A method of using a single-instruction multiple-data processor for processing a digitized standard television signal to provide an improved picture for display, comprising the steps of: detecting areas of said picture in which there is motion; providing clean luminance and clean chrominance signals by removing cross signals from luminance and chrominance portions of the transmitted signal, using digital filtering techniques, wherein sid filtering is spatial in areas of said picture in which there is motion and temporal in areas of said picture in which there is no motion; wherein said steps are performed on digital samples of a horizontal line of said picture, simultaneously with respect to said samples, and wherein all of said steps occur in less than one horizontal scan period with respect to each line.
Claim 12
Dependent Claim
52 words
The method of Claim 11 further characterized by: providing a transient mode, during which said clean luminance and said clean chrominance signals are stored rather than processed and output; and providing a still mode, during which current data input to said processor is ceased and said processing is performed on redirected data.
Claim 13
Dependent Claim
47 words
The method of Claim 12 further characterized by: providing a full screen picture using said processed data, synchronized with a first set of control and timing signals; and providing a sub-picture still mode using said processed data, synchronized with a second set of control and timing signals.
Claim 14
Independent Claim
94 words
A method of using single-instruction multiple-data processor for detecting motion in areas of a digitized standard television signal to provide an improved picture for display, comprising the steps of: using register files of said processor to emulate line memories for data representing horizontal lines of said picture; and processing said data by first obtaining data delayed by one frame and subtracting said delayed data from current frame data, filtering said data to obtain a motion magnitude signal, comparing said data with feedback data to prevent loop gain, and filtering said data to reduce noise.
Claim 15
Dependent Claim
61 words
The method of Claim 14 further characterized by: in areas of said picture having no motion, bringing forward field-delayed data to generate an additional line; in areas of said picture having motion, averaging current data to generate an additional line; and switching between said bringing forward step and said averaging step, using a motion detection signal, to generate an interpolated line.
Claim 16
Dependent Claim
103 words
The method of Claim 14 further characterized by: in areas of said picture having no motion, subtracting a two-field delayed signal from a current signal to obtain a crosstalk signal; in areas of said picture having motion, spatially filte ring said current signal; switching between the output of said subtraction step and the output of said spatial filtering step, using a motion detection signal; bandbass filtering the output of said switching step, using a horizontal bandpass filtering process to obtain a crosstalk signal; and subtracting the output of said bandpass filtering step from said current signal to obtain a signal containing no crosstalk.
References Cited (Backward Citations)
No citation records indexed.
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