IMAGE DATA TRANSFER SYSTEM, TRANSMITTER CIRCUIT AND RECEIVER CIRCUIT

• US 20170221448A1
• Filed: 01/23/2017
• Published: 08/03/2017
• Est. Priority Date: 01/29/2016
• Status: Active Grant

• Current Assignee: Synaptics Incorporated
• Original Assignee: Synaptics Japan GK (Synaptics Incorporated)
• Inventors: HARADA, Masashige, SHIRAISHI, Iori, NOSE, Takashi, FURIHATA, Hirobumi
• Granted Patent: US 10,446,111 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 2310/027 Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2340/02 Handling of images in compressed format, e.g. JPEG, MPEG
• CPC Class Codes: G09G 2360/18 Use of a frame buffer in a display terminal, inclusive of the display panel
• CPC Class Codes: G09G 2370/08 Details of image data interface between the display device controller and the data line driver circuit
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H04N 19/103 Selection of coding mode or of prediction mode
• CPC Class Codes: H04N 19/156 Availability of hardware or computational resources, e.g. encoding based on power-saving criteria
• CPC Class Codes: H04N 19/426 using memory downsizing methods

Abstract

An image data transfer system includes a receiver and a transmitter configured to sequentially receive compressed image data and sequentially transmit transmission data corresponding to the compressed image data to the receiver. The transmitter is configured to, in transmitting a specific transmission data, perform data comparison of bits of a compressed image body data of a specific compressed image data with bits of a previous transmission data transmitted over signal lines allocated to the compressed image body data, incorporate the compressed image body data of the specific compressed image data or the bit-inverted data corresponding thereto into the specific transmission data, in response to the result of the data comparison, and incorporate the compression code of the specific compressed image data into the specific transmission data independently of the result of the data comparison.

Claims

1. An image data transfer system, comprising:

a receiver; and

a transmitter configured to sequentially receive compressed image data, and to sequentially transmit transmission data corresponding to the compressed image data to the receiver,

wherein each of the compressed image data is generated through a selected compression process selected from a plurality of compression processes and includes a compression code indicating the selected compression process and a compressed image body data,

wherein each of the transmission data includes the compression code included in the corresponding compressed image data and a selected one of the compressed image body data of the corresponding compressed image data and a bit-inverted data obtained through bit-inversion on the compressed image body data of the corresponding compressed image data, and

wherein the transmitter is configured to, when transmitting a specific one of the transmission data corresponding to a specific one of the compressed image data, perform data comparison of bits of the compressed image body data of the specific compressed image data with bits of a previous one of the transmission data which has just previously transmitted before the specific transmission data over signal lines allocated to the compressed image body data of the specific compressed image data or the bit-inverted data, incorporate the compressed image body data of the specific compressed image data or the bit-inverted data corresponding thereto into the specific transmission data, in response to the result of the data comparison, and incorporate the compression code of the specific compressed image data into the specific transmission data independently of the result of the data comparison.

2. The image data transfer system according to claim 1, wherein transmitting the specific transmission data to the receiver comprises:

transmitting an inversion indication bit indicating which of the compressed image body data of the specific compressed image data and the bit-inverted data corresponding thereto is transmitted to the receiver,

wherein the receiver is configured to sequentially receive the transmission data and output reception compressed image data respectively corresponding to the transmission data, and

wherein, when receiving the specific transmission data from the transmitter, the receiver is configured to refer to the inversion indication bit, incorporate the compressed image body data included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data, when the specific transmission data includes the compressed image body data of the specific compressed image data, incorporate data obtained by performing bit-inversion on the bit-inverted data included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data, when the specific transmission data includes the bit-inversion data of the compressed image body data of the specific compressed image data, and incorporate the compression code included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data, independently of the inversion indication bit.

3. The image data transfer system according to claim 1, wherein numbers of bits of the compression codes of the compressed image data are variable in response to the selection of the plurality of compression processes,

wherein the transmitter includes:

a first compression code length identification section configured to identify the number of bits of the compression code of the specific compressed image data and output a first compression code length signal indicating the identified number of bits of the compression code of the specific compressed image data;

a transmission data comparator section to identify the signal lines allocated to the compressed image body data of the specific compressed image data or the bit-inverted data corresponding thereto based on the first compression code length signal, and performs the data comparison of the bits of the compressed image body data of the specific compressed image data with the bits of the previous transmission data which have been transmitted over the signal lines; and

a first data-bit inversion section configured to incorporate the compressed image body data of the specific compressed image data or the bit-inverted data corresponding thereto in response to the result of the data comparison and the first compression code length signal, and incorporate the compression code of the specific compressed image data into the specific transmission data independently of the result of the data comparison.

4. The image data transfer system according to claim 2, wherein the receiver includes:

a second compression code length identification section configured to identify the number of bits of the compression code included in the specific transmission data and output a second compression code length signal indicating the identified number of bits of the compression code included in the specific transmission data; and

a second data-bit inversion section configured to incorporate the compressed image body data included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data in response to the inversion indication bit and the second compression code length signal, when the specific transmission data includes the compressed image body data of the specific compressed image data, incorporate the bit-inverted data included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data in response to the inversion indication bit and the second compression code length data, when the specific transmission data includes the bit-inverted data of the specific compressed image data, and incorporate the compression code included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data, independently of the inversion indication bit.

5. The image data transfer system according to claim 1, further comprising:

a compression unit configured to sequentially receive image data, select the selected compression process for each of the image data from the plurality of compression processes in response to characteristics of each of the image data, and generate the compressed image data by performing the selected compression process each of the image data.

6. A transmitter circuit configured to sequentially receive compressed image data and sequentially transmit transmission data corresponding to the compressed image data, wherein each of the compressed image data is generated through a selected compression process selected from a plurality of compression processes and includes a compression code indicating the selected compression process and a compressed image body data, and

wherein each of the transmission data includes the compression code included in the corresponding compressed image data and selected one of the compressed image body data of the corresponding compressed image data and a bit-inverted data obtained through bit-inversion on the compressed image body data of the corresponding compressed image data,

a transmission data comparator section configured to, in transmitting a specific one of the transmission data corresponding to a specific one of the compressed image data, perform data comparison of bits of the compressed image body data of the specific compressed image data with bits of a previous one of the transmission data which has just previously transmitted before the specific transmission data over signal lines allocated to the compressed image body data of the specific compressed image data or the bit-inverted data corresponding thereto;

and

a data-bit inversion section configured to incorporate the compressed image body data of the specific compressed image data or the bit-inverted data corresponding thereto into the specific transmission data, in response to the result of the data comparison and incorporate the compression code of the specific compressed image data into the specific transmission data independently of the result of the data comparison.

7. The transmitter circuit according to claim 6, further comprising a first compression code length identification section configured to identify the number of bits of the compression code of the specific compressed image data and output a first compression code length signal indicating the identified number of bits of the compression code of the specific compressed image data,

wherein the transmission data comparator section is configured to identify the signal lines allocated to the compressed image body data of the specific compressed image data or the bit-inverted data corresponding thereto based on the first compression code length signal, and performs the data comparison of the bits of the compressed image body data of the specific compressed image data with the bits of the previous transmission data which have been transmitted over the signal lines.

8. A receiver circuit comprising:

an interface configured to externally and sequentially receive transmission data generated from compressed image data and inversion indication bits associated therewith; and

a data-bit inversion section configured to sequentially receive the transmission data and output reception compressed image data respectively corresponding to the transmission data in response to the inversion indication bits,

wherein each of the compressed image data is generated through a selected compression process selected from a plurality of compression processes and includes a compression code indicating the selected compression process and a compressed image body data,

wherein each of the transmission data includes the compression code included in the corresponding compressed image data and selected one of the compressed image body data of the corresponding compressed image data and a bit-inverted data obtained through bit-inversion on the compressed image body data of the corresponding compressed image data,

wherein each of the inversion indication bits indicates which of the compressed image body data of the corresponding compressed image data and the bit-inverted data corresponding thereto is included in the corresponding transmission data,

wherein the data-bit inversion section is configured to, in receiving a specific one of the transmission data, refer to the inversion indication bit associated with the specific transmission data, incorporate the compressed image body data included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data when the specific transmission data includes the compressed image body data of the specific compressed image data, incorporate data obtained by performing bit-inversion on the bit-inverted data included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data, when the specific transmission data includes the bit-inversion data of the compressed image body data of the specific compressed image data, and incorporate the compression code included in the specific transmission data into the reception compressed image data corresponding to the specific transmission data, independently of the corresponding inversion indication bit.

9. The receiver circuit according to claim 8, further comprising:

a second compression code length identification section configured to identify the number of bits of the compression code included in the specific transmission data and output a second compression code length signal indicating the identified number of bits of the compression code included in the specific transmission data; and

wherein the data-bit inversion section is configured to identify, with respect to the specific transmission data, a first part incorporating the compression code of the corresponding compressed image data, and a second part incorporating the compressed image body data of the corresponding compressed image data or the bit-inverted data corresponding thereto, based on the second compression code length signal.