Signal processing device, imaging device, reading device, image forming device, and signal processing method
AssigneeRicoh Company, Ltd.
InventorsShinji Sakaguchi, Tohru Kanno, Masamoto Nakazawa
Life of this patent
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Abstract
A signal processing device includes a data writing unit, a channel number converting unit, and a plurality of serial data transferring unit. The data writing unit is configured to write data of m channels into a memory. The channel number converting unit is configured to output the data read from the memory as data of n channels, where m is larger than n. The plurality of serial data transferring unit is configured to transfer the data of the n channels to a processing device in a subsequent stage.
Claims12
A signal processing device, comprising:
- a data writing circuit configured to write data of m channels into a memory, each of the m channels corresponding to one of m colors;
- a channel number converting circuit configured to output the data read from the memory as data of n channels, wherein m is variable and larger than n and n is constant;
- a plurality of serial data transferring circuits configured to transfer the data of the n channels to a processing device in a subsequent stage;
- and
- a speed converting circuit configured to convert a data reading speed from the memory to be larger than a data writing speed into the memory, wherein
- the channel number converting circuit is configured to convert the data of the m channels into the data of n channels, the data reading speed of the data of the m channels being made larger by the speed converting circuit, and
- the speed converting circuit is configured to convert a frequency of reading the data from the memory to be equal to or more than m/n times a frequency of writing the data into the memory.
A signal processing device, comprising:
- a data writing circuit configured to write data of m channels into a memory, each of the m channels corresponding to one of m colors;
- a channel number converting circuit configured to output the data read from the memory as data of n channels, m being larger than n;
- and
- a plurality of serial data transferring circuits configured to transfer the data of the n channels to a processing device in a subsequent stage, wherein
- the data writing circuit is configured to write only the data of the n channels among the data of the m channels into the memory when only the data of the n channels are required.
A signal processing method performed in a signal processing device, the signal processing method comprising:
- writing data of m channels into a memory, each of the m channels corresponding to one of m colors;
- transferring the data of the m channels read from the memory to a processing device in a subsequent stage as a plurality of serial signals of n channels, wherein m is variable and larger than n and n is constant;
- converting a data reading speed from the memory to be larger than a data writing speed into the memory;
- converting the data of the m channels into the data of n channels, the data reading speed of the data of the m channels being made larger;
- and
- converting a frequency of reading the data from the memory to be equal to or more than m/n times a frequency of writing the data into the memory.
Dependencies are inferred from the claim text.