IMAGE SUPPLY DEVICE, IMAGE DISPLAY DEVICE, IMAGE TRANSFER SYSTEM, AND METHOD OF DETERMINING IMAGE COMPRESSION METHOD

• US 20070230561A1
• Filed: 02/13/2007
• Published: 10/04/2007
• Est. Priority Date: 03/28/2006
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: ICHIEDA, Hiroyuki
• Application Number:
  US11/674,400
• Publication Number:
  US 20070230561A1
• Time in Patent Office: Days
• US Class Current: 375/240
• CPC Class Codes: H04N 19/12 Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
• CPC Class Codes: H04N 19/134 characterised by the element, parameter or criterion affecting or controlling the adaptive coding
• CPC Class Codes: H04N 19/60 using transform coding

Abstract

An image supply device to be connected to an image display device via a predetermined transmission channel, for supplying the image display device with an image signal by transferring the image signal to the image display device via the transmission channel, thereby making the image display device display an image represented by the image signal, includes a transfer rate derivation section that derives a transfer rate of the image signal when transferring the image signal to the image display device via the transmission channel, and a compression method determination section that determines a compression method of the image signal when supplying the image display device with the image signal by transferring the image signal to the image display device via the transmission channel based on the transfer rate derived in the transfer rate derivation section.

Claims

1. An image supply device to be connected to an image display device via a predetermined transmission channel, for supplying the image display device with an image signal by transferring the image signal to the image display device via the transmission channel, thereby making the image display device display an image represented by the image signal, comprising:

a transfer rate derivation section that derives a transfer rate of the image signal when transferring the image signal to the image display device via the transmission channel; and

a compression method determination section that determines a compression method of the image signal when supplying the image display device with the image signal by transferring the image signal to the image display device via the transmission channel based on the transfer rate derived in the transfer rate derivation section.

7. The image supply device according to claim 1,

further comprising

a test image supply section for supplying the image display device with a test image signal representing a predetermined test image by transferring the test image signal to the image display device via the transmission channel,

wherein

the transfer rate derivation section derives the transfer rate based on a transfer time period of the test image signal supplied to the image display device by the test image supply section via the transmission channel.

8. The image supply device according to claim 7,

wherein

the test image supply section supplies the image display device with the test image signal by transferring the test image signal to the image display device via the transmission channel in response to establishment of communication with the image display device.

9. The image supply device according to claim 1

further comprising:

a transmission channel discrimination section that discriminates a type of the transmission channel; and

a transfer rate storage section that stores a transfer rate table showing a transfer rate of the transmission channel for every type of the transmission channel,

wherein

the transfer rate derivation section refers to the transfer rate table based on the type of the transmission channel discriminated in the transmission channel discrimination section to derive the transfer rate.

10. The image supply device according to claim 9,

wherein

the transmission channel discrimination section discriminates the type of the transmission channel in response to establishment of communication with the image display device.

2. An image supply device to be connected to an image display device via a predetermined transmission channel, for supplying the image display device with an image signal by transferring the image signal to the image display device via the transmission channel, thereby making the image display device display an image represented by the display signal, comprising:

a transfer rate derivation section that derives a transfer rate of the image signal when transferring the image signal to the image display device via the transmission channel;

a table obtaining section that obtains a table on which, regarding a specific image signal, at least a size of the specific image signal after compressed and a decompression time period when decompressing the compressed specific image signal in the image display device are described for every compression method;

a processing time period calculation section that calculates a time period when at least the compressed specific image signal is transferred to the image display device via the transmission channel, and decompressed in the image display device referring to the derived transfer rate and the obtained table as a processing time period for every compression method; and

a compression method determination section that determines the compression method minimizing the calculated processing time period as the compression method of the image signal when transferring the image signal to the image display device via the transmission channel.

3. The image supply device according to claim 2,

further comprising

a table storage section that stores the table,

wherein

the table obtaining section obtains the table from the table storage section.

4. The image supply device according to claim 2,

wherein

the table obtaining section obtains the table from the image display device.

5. The image supply device according to claim 2,

wherein

the processing time period calculation section calculates a transfer time period when transferring the compressed specific image signal to the image display device via the transmission channel based on the transfer rate and the size described on the table, and calculates the processing time period for every compression method by adding the decompression time period described on the table and the calculated transfer time period.

6. The image supply device according to claim 2,

wherein

in the table, there are further described for every compression method, regarding the specific image signal, besides the size and the decompression time period, a compression time period when compressing the specific image signal in the image supply device, and

the processing time period calculation section calculates a transfer time period when transferring the compressed specific image signal to the image display device via the transmission channel based on the transfer rate and the size described on the tables and calculates the processing time period for every compression method by adding the decompression time period and the compression time period described on the table and the calculated transfer time period.

11. An image display device that can be connected to an image supply device via a predetermined transmission channel, comprising:

a table storage section that stores a table on which, regarding a specific image signal, at least a size of the specific image signal after compressed and a decompression time period when decompressing the compressed specific image signal in the image display device are described for every compression method; and

a table transfer section that transfers the table to the image supply device via the transmission channel.