Receiving transmitting device for multiple datas having different gray scales
A technology of a data receiving device and a data receiving method, which is applied in the direction of electrical digital data processing, special data processing applications, connecting components, etc., can solve the problems of unbearable use, inability to fully and flexibly utilize the receiving side, etc., and achieve the effect of easy extraction
Inactive Publication Date: 2003-08-20
PANASONIC CORP
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[0015] In the above-mentioned receiving and transmitting method, for example, in the case where the transmitting side transmits only 2-level grayscale data, although the receiving side has the ability to use 8-level grayscale data, only 2-level grayscale data can be used, so that it cannot be sufficiently flexible. Using functions on the receiving side
[0016] However, if the above-mentioned method is adopted, the receiving device must have a part for converting the gray-scale number of the gray-scale data, and the received gray-scale data cannot be completely reproduced in a receiving device without a conversion device, and even if it is reproduced, it will become unusable. grade
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Embodiment 2
[0167] In embodiment 2, when there is no data of the optimal gray scale number in the gray scale data received as in embodiment 1, it is also planned to extract the minimum gray scale data exceeding the optimal gray scale number, and transform it Output the data of the optimal number of gray scales, in the case of doing so, still in the receiving device 2B, between the parts from the gray scale data extraction unit 27 to the gray scale data output unit 23, as shown in Figure 17 As shown, the gradation data converting unit 28 is provided, and the minimum gradation data exceeding the optimal number of gradation levels can be extracted by the extracted gradation data determining unit 26 .
[0168] In the absence of the received data of the optimal gray scale, the conversion is not performed uniformly, but the received data of the maximum gray scale that does not exceed the optimal gray scale can be extracted according to the situation. This situation is also different from the imp...
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When communicating data, the transmitter reads a plurality of sets of gradation data related to a same subject and transmits the plurality of sets of gradation data. The receiver decides an optimal number of shades for output purposes, receives the transmitted data and, by analyzing the number of shades in each received set of gradation data, determines which of the received sets of gradation data has the optimal number of shades. The receiver then extracts the received set of gradation data with the optimal number of shades and performs output.
Description
technical field [0001] The present invention relates to a data receiving and sending device and a data receiving and sending method for sending font data and image data through communication lines and broadcasting devices and for receiving and displaying the sent data. Background technique [0002] In the data receiving and transmitting system, data such as fonts and images are sometimes transmitted as gradation data composed of a plurality of gradation levels. When such gradation data is transmitted, the number of gradation levels that can be displayed is limited by the capabilities of the playback device on the receiving side, and the transmitted gradation levels cannot be displayed on the receiving side at the original number of gradation levels. data. In such a case, in the past, the gradation data received by the receiving device was converted into data of the number of gradation levels that can be displayed on the receiving side, and then displayed. [0003] Next, th...
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IPC IPC(8): G06F17/00H04NH04N7/085
CPCF16B2/08F16L3/137
Inventor 松居美佳中井贤宫部义幸森田克之
Owner PANASONIC CORP