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EP0095931A2
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Picture data storage system
Assignee: Fujifilm Business Innovation Corp
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Filing: 1983-05-31
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Granted: —
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Expires: 2003-05-31
Abstract
Abstract A picture data storage system and an apparatus and a method for compressing picture data including a map memory and a data memory. The map memory contains a plurality of picture unit memory regions while the data memory contains a plurality of picture data memory regions. A pointer is stored in each picture unit memory region of the map memory, one pointer for each corresponding unit of input data. For units of input picture data containing other than all «o»s, the data is stored in a corresponding picture data region of the data memory. On the other hand, for all picture units containing all «0»s (completely white), the pointers point to a single picture data memory region in the data memory which contains all«0»s.
Inventors
- 👤 Fukumi Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 14:22
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/32101; H04N1/32106; H04N1/32112; H04N1/41; H04N1/411; H04N1/413; H04N1/415; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3225; H04N2201/3254; H04N2201/3274; H04N2201/3277
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
A picture data storage system, comprising: a map memory containing a plurality of picture unit memory regions in correspondence with picture units obtained by dividing input picture data into units of matrices of dots; and a data memory for storing picture data of said picture units, and said picture unit memory regions of said map memory corresponding in memory position with said picture units stored in said data memory, and each said picture unit memory region in said map memory storing a pointer to an address of said data memory at which is stored the corresponding picture data of the corresponding unit.
Claim 2
Dependent Claim
102 words
A picture data storage system, comprising: a map memory containing a plurality of picture unit memory regions in correspondence with picture units obtained by dividing input picture data into units of matrices of dots; and a data memory for storing picture data of said picture units, and said picture unit memory regions of said map memory corresponding in memory position with said picture units stored in said data memory, and each said picture unit memory region in said map memory storing a pointer to an address of said data memory at which is stored the corresponding picture data of the corresponding unit.
Claim 3
Dependent Claim
26 words
The picture data storage system of claim 1, wherein each said pointer is a top address to a stack of data comprising the corresponding picture unit.
Claim 4
Dependent Claim
44 words
The picture data storage system of claim 2, wherein all said pointers corresponding to picture units containing predetermined uniform data are of equal value and point to an address of said data memory at which is stored picture data corresponding to said uniform data.
Claim 5
Independent Claim
310 words
A method for operating a picture data conversion system which includes a buffer to which a picture input signal is applied in data words of a predetermined number of data bits, first means for detecting the end of each line in said picture input signal, second means for counting an output of said first means to count a number of lines, a map memory which is addressed each time one word of said picture input signal is received, a data memory having a plurality of memory regions which correspond to pointers stored in said map memory, a pointer register to which data of said map memory thus addressed is inputted; and third means for setting a new pointer in said pointer register, said method comprising the steps of: (1) if data of one word applied to said buffer includes data other than all "0"s and the corresponding data of said map memory inputted to said pointer register is one of all "0"s and a predetermined value, storing said new pointer in said map memory and writing the data of <aid one word in said data memory with said pointer as an address; (2) if data of said one word applied to said buffer includes data other than all "0"s and the corresponding data of said map memory inputted to said pointer register is an actual pointer, writing the data of said one word into said data memory with said pointer as an address; (3) if data of said one word applied to said buffer is all "0"s, returning to said step (1) and processing new a data word in said buffer without accessing said map memory and data memory; and (4) repeating said steps (1) to (3) the same number of times as a predetermined number of lines for a region of said map memory which corresponds to one line.
Claim 6
Independent Claim
310 words
A method for operating a picture data conversion system which includes a buffer to which a picture input signal is applied in data words of a predetermined number of data bits, first means for detecting the end of each line in said picture input signal, second means for counting an output of said first means to count a number of lines, a map memory which is addressed each time one word of said picture input signal is received, a data memory having a plurality of memory regions which correspond to pointers stored in said map memory, a pointer register to which data of said map memory thus addressed is inputted; and third means for setting a new pointer in said pointer register, said method comprising the steps of: (1) if data of one word applied to said buffer includes data other than all "0"s and the corresponding data of said map memory inputted to said pointer register is one of all "0"s and a predetermined value, storing said new pointer in said map memory and writing the data of <aid one word in said data memory with said pointer as an address; (2) if data of said one word applied to said buffer includes data other than all "0"s and the corresponding data of said map memory inputted to said pointer register is an actual pointer, writing the data of said one word into said data memory with said pointer as an address; (3) if data of said one word applied to said buffer is all "0"s, returning to said step (1) and processing new a data word in said buffer without accessing said map memory and data memory; and (4) repeating said steps (1) to (3) the same number of times as a predetermined number of lines for a region of said map memory which corresponds to one line.
Claim 7
Dependent Claim
175 words
A picture data conversion device comprising: first and second memory buffers each having a capacity of 2 m x N, with 2 m L , where L is a number of words for each line of picture data and one word x N lines forms one unit; first and second buffer address registers for addressing said first and second memory buffers, respectively; a map memory in which pointers indicating whether each unit of data read out from said first and second memory buffers is all "0"s or not are stored in correspondence with each said unit; a data memory in which, when the data of said one unit is not all "0"s, the data of said one unit which is not all "0"s is stored in an area with said pointer as an address; and means for continuously reading, while input picture data is being stored in one of said first and second memory buffers, N words for every 2 m addresses read out of the other memory buffer, whereby said picture data is compressed.
Claim 8
Dependent Claim
175 words
A picture data conversion device comprising: first and second memory buffers each having a capacity of 2 m x N, with 2 m L , where L is a number of words for each line of picture data and one word x N lines forms one unit; first and second buffer address registers for addressing said first and second memory buffers, respectively; a map memory in which pointers indicating whether each unit of data read out from said first and second memory buffers is all "0"s or not are stored in correspondence with each said unit; a data memory in which, when the data of said one unit is not all "0"s, the data of said one unit which is not all "0"s is stored in an area with said pointer as an address; and means for continuously reading, while input picture data is being stored in one of said first and second memory buffers, N words for every 2 m addresses read out of the other memory buffer, whereby said picture data is compressed.
Claim 9
Dependent Claim
53 words
The picture data conversion device of claim 5, wherein said reading means reads said data out of said other of said first and second memory buffers in an address sequence corresponding to an address sequence with which said input picture data is simultaneously stored in said one of said first and second buffers.
References Cited (Backward Citations)
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