CN100385926C - liquid crystal display system with storage function - Google Patents

Abstract

The present invention relates to a liquid crystal display system with storage function, comprising an image input interface, a buffer, a deinterlacing device, an enlargement/reduction device, an image processing device, a buffer controller, a storage medium interface and a direct memory access controller. The image input interface receives an external input image data stream; the buffer is coupled to the image input interface to temporarily store the input image data stream; the storage medium interface is coupled to an external storage medium and the buffer to transmit an image data stream stored in the storage medium to the buffer for playback, or transmit an image data stream in the buffer to the storage medium for storage. The direct memory access controller is used to accelerate the data access speed between the storage medium interface and the buffer.

Description

Liquid crystal display system with storage function

technical field

The invention relates to a liquid crystal display system, especially a liquid crystal display system with a storage function.

Background technique

Due to the rapid evolution of electronic technology, all electronic products are evolving towards the trend of "light, thin, short and small". In the past, televisions used cathode ray tubes, and the larger the screen size of the television, the thicker the television. This is an important problem how to arrange a large-size TV set in a modern narrow space. However, due to the birth of the liquid crystal display, the above-mentioned problems no longer exist.

The current LCD TV is to combine the LCD with the TV decoding device, and the TV program can be played on the LCD for the user to watch, or the LCD TV can be connected to the computer as the output device of the computer (ie, the LCD). Whether it is used to play TV programs or output computer signals, LCD TV is only used as an output device. However, as the application of digital information becomes more and more mature, how to provide more diverse applications with the digital video processed by LCD TV There is a real need to meet the needs of users.

Contents of the invention

The object of the present invention is to provide a liquid crystal display system with storage function, so that a TV program can be stored in the liquid crystal display system.

According to the characteristics of the present invention, it is to provide a liquid crystal display system with a storage function, which is characterized in that it includes:

an image input interface, which receives an externally input image data stream;

a buffer, coupled to the image input interface, to temporarily store the input image data stream;

a de-interlacing device coupled to the buffer for converting the video data stream from an interlaced video format to a non-interlaced video format;

An enlargement/reduction device, coupled to the de-interlacing device, enlarges or reduces the image data stream in the non-interlaced image format according to the size of a liquid crystal display screen;

An image processing device, coupled to the enlargement/reduction device, performs image processing on the enlarged or reduced image data stream, so as to improve the image quality of the image data stream;

a buffer controller, used to control the access of the buffer;

A storage medium interface is coupled to an external storage medium and the buffer, so as to transmit an image data stream stored in the storage medium to the buffer for playback, or an image in the buffer the data stream is transmitted to the storage medium for storing the image data stream; and

A direct memory access controller, which is coupled to the storage medium interface, is used to accelerate the data access speed between the storage medium interface and the buffer.

It also contains:

An image codec is coupled to the buffer to encode the image data stream in the buffer and then transmit it to the storage medium interface for storage in an external storage medium or to be read by the storage medium interface After decoding the image data stream input into the buffer, it is played.

It also contains:

A screen direct display device for displaying relevant information on the liquid crystal display screen; and

A mixer and an output formatting device, which are coupled to the on-screen direct display device and the image processing device, so as to combine the output image of the on-screen direct display device with the output image data stream of the image processing device, and then play them .

Wherein, the image codec can be a JPEG codec for performing JPEG encoding/decoding on the image.

Wherein, the image codec can be an MPEG2 codec to perform MPEG2 encoding/decoding on the image.

Wherein, the image codec can be an MPEG4 codec to perform MPEG4 encoding/decoding on the image.

Wherein, the image input interface is coupled to an external TV decoding device to receive the digital image data stream transmitted by the TV decoding device.

Wherein, the digital image data stream is one of the following formats: YCbCr, RGB format.

Description of drawings

In order to further illustrate the technical content of the present invention, the following detailed description is as follows in conjunction with the embodiments and accompanying drawings, wherein:

FIG. 1 is a system block diagram of a liquid crystal display system with storage function according to the present invention.

FIG. 2 is a schematic diagram of image data transmission when playing a TV program according to the present invention.

Fig. 3 is a schematic diagram of the non-interleaved display conversion of the present invention.

FIG. 4 is a schematic diagram of playing a video data transmission stored in a storage medium according to the present invention.

FIG. 5 is a schematic diagram of image data transmission when storing a TV program according to the present invention.

Detailed ways

Regarding the preferred embodiment of the liquid crystal display system with storage function of the present invention, please refer to the system block diagram shown in Fig. Buffer controller 225, a deinterlacing device 230, an enlargement/reduction device 235, an image processing device 240, an image codec 245, a storage medium interface 250, a direct memory access controller 255, a mixer And output formatting device 260, a screen direct display device 26

5, and a processor 270.

The image input interface 210 is coupled to an external TV decoding device 280 for receiving an image data stream generated by the TV decoding device 280, and the format of the image data stream is YCbCr or RGB. The scaling down/passing device 215 performs a scaling down or bypass operation according to the resolution of a liquid crystal display screen. The buffer 220 is coupled to the downscaling/passing device 215 for temporarily storing the input video stream. The buffer controller 225 is used for controlling the access of the buffer 220 .

The de-interlacing device 230 is coupled to the buffer 220 for converting the image data stream from an interlaced image format to a non-interlaced image format. The enlargement/reduction device 235 is coupled to the de-interlacing device 230, and enlarges or reduces the image data stream in the non-interlaced image format according to the resolution of the liquid crystal display screen. The image processing device 240 is coupled to the enlargement/reduction device 235, and performs image processing on the enlarged or reduced image data stream to improve the image quality of the image data stream. The image processing can be brightness processing (brightness), contrast processing (contrast), color frequency processing (hue) and saturation processing (Saturation).

The screen direct display device 265 (on screen dsplay, OSD) is used to display relevant information of the liquid crystal display screen, such as brightness (brightness), contrast (contrast), image lock (image lock), display mode of the liquid crystal display screen (display mode) and other information. The mixer and output formatter 260 are coupled to the screen direct display device 2

65 and the image processing device 240, after the output image of the screen direct display device 265 and the output image data stream of the image processing device 240 are superimposed, and then output to the liquid crystal display screen for playback.

The storage medium interface 250 is coupled to an external storage medium 290, so as to transmit an image data stream stored in the storage medium 290 to the buffer zone 220 for playback, or an image in the buffer zone 220 The data stream is sent to the storage medium 290 to store the image data stream. The external storage medium 290 can be a CF card, an SD card, a memory stick card (Memory Stick Card), a smart media card (Smart Media Card), a multimedia card (Multi Media Card) or a micro hard drive (Macro Drive). It is a hard disk device with ATA interface to provide storage function. The direct memory access controller 255 is used to accelerate the data access speed between the storage medium interface 250 and the buffer 220 .

The image codec 245 is coupled to the buffer 220, so that after the image data stream in the buffer 220 is coded, it is sent to the storage medium interface 250 to be stored in an external storage medium 290, or the The image data stream read into the buffer 220 by the storage medium interface 250 is decoded and then played. The video codec 24

5 can be a JPEG codec to perform JPEG encoding/decoding on images. The image codec 245 can also be an MPEG 2 codec to perform MPEG 2 encoding/decoding on images. The image codec 245 can also be an MPEG 4 codec to perform MPEG 4 encoding/decoding on images.

FIG. 2 is a schematic diagram of image data transmission when playing a TV program according to the present invention. An analogous TV program signal is decoded into a digital YCbCr data stream by the TV decoding device 280 and output to the video input interface 210 . Since the resolution of a general TV program is lower than that of a liquid crystal display screen (not shown), the reduction/passing device 215 performs a direct bypass operation to transmit the digital YCbCr data stream to the buffer 220 in. The buffer controller 225 reads the digital YCbCr data stream from the buffer 220 and sends it to the de-interleaving device 230, so that the digital YCbCr data stream is converted from an interlaced (interlace) format to a non-interleaved format. (non-interlace) format. As shown in FIG. 3 , the odd field and the even field in the digital YCbCr data stream are converted into a non-interlaced frame.

The non-interlaced digital YCbCr data stream is then enlarged by the enlargement/reduction device 235 to a size suitable for displaying on the liquid crystal display. Then the image processing device 240 performs image processing such as brightness, contrast, hue and saturation to enhance the image quality of the non-interlaced digital YCbCr data stream. Finally, through the mixer and the output formatter 260, the OSD data of the on-screen display device 265 is mixed with the non-interlaced digital YCbCr data stream, and an appropriate output data stream is generated for output to the LCD screen.

FIG. 4 is a transmission schematic diagram of playing an image data stored in the storage medium 290 according to the present invention. The image data is stored in the storage medium 290 in a compressed format. First, the processor 270 reads the file header of the image data from the storage medium interface 250, and interprets the file header of the image data through the processor 270 to obtain information such as format and size of the image data. The processor 27 configures the DMA controller 255 to move the image data into the buffer 220 . The decompression by the video codec 245 restores the video and sends it back to the buffer 220 . The buffer controller 225 reads the decompressed image data from the buffer 220, and sends it to the interleaving device 230, the enlargement/reduction device 235 and the image processing device 240 to generate an appropriate output data stream and output it to the liquid crystal display screen.

FIG. 5 is a schematic diagram of image data transmission when storing a TV program according to the present invention. An analogous TV program signal is decoded into a digital YCbCr data stream by the TV decoding device 280 and output to the video input interface 210 . To save storage space, the scale-down/pass device 215 performs a scaling-down operation and sends the digital YCbCr data stream to the buffer 220 . The compression of the image codec 245 then compresses the image into digital YCbCr data format and sends it back to the buffer 220 . Then through the direct memory access controller 255 , the compressed image data is stored in the storage medium 290 through the storage medium interface 250 . In this way, the purpose of recording a complete TV program can be achieved, and then the complete TV program can be played through the data transmission path of playing the storage medium shown in FIG. 4 .

It can be known from the above description that the present invention utilizes the storage medium interface 250 and the direct memory access controller 255 to store a TV program in a storage medium 290 to achieve the purpose of recording a complete TV program. Therefore, the present invention can not only solve the problem that the known liquid crystal display system cannot store TV programs, but also increase the convenience of users.

The above-mentioned embodiments are only examples for convenience of description, and the scope of rights claimed by the present invention should be based on the scope of the patent application, rather than limited to the above-mentioned embodiments.

Claims (8)

1. A liquid crystal display system with storage function, characterized in that, comprising: an image input interface, which receives an externally input image data stream; a buffer, coupled to the image input interface, to temporarily store the input image data stream; a de-interlacing device coupled to the buffer for converting the video data stream from an interlaced video format to a non-interlaced video format; An enlargement/reduction device, coupled to the de-interlacing device, enlarges or reduces the image data stream in the non-interlaced image format according to the size of a liquid crystal display screen; An image processing device, coupled to the enlargement/reduction device, performs image processing on the enlarged or reduced image data stream, so as to improve the image quality of the image data stream; a buffer controller, used to control the access of the buffer; A storage medium interface is coupled to an external storage medium and the buffer, so as to transmit an image data stream stored in the storage medium to the buffer for playback, or an image in the buffer the data stream is transmitted to the storage medium for storing the image data stream; and A direct memory access controller, which is coupled to the storage medium interface, is used to accelerate the data access speed between the storage medium interface and the buffer. 2. The liquid crystal display system with storage function as claimed in claim 1, further comprising: An image codec is coupled to the buffer to encode the image data stream in the buffer and then transmit it to the storage medium interface for storage in an external storage medium or to be read by the storage medium interface After decoding the image data stream input into the buffer, it is played. 3. The liquid crystal display system with storage function as claimed in claim 1, further comprising: A screen direct display device for displaying relevant information on the liquid crystal display screen; and A mixer and an output formatting device, which are coupled to the on-screen direct display device and the image processing device, so as to combine the output image of the on-screen direct display device with the output image data stream of the image processing device, and then play them . 4. The liquid crystal display system with storage function as claimed in claim 2, wherein the image codec is a JPEG codec for performing JPEG encoding/decoding on the image. 5. The liquid crystal display system with storage function as claimed in claim 2, wherein the image codec can be an MPEG 2 codec to perform MPEG 2 encoding/decoding on images. 6. The liquid crystal display system with storage function as claimed in claim 2, wherein the image codec can be an MPEG 4 codec to perform MPEG 4 encoding/decoding on images. 7. The liquid crystal display system with storage function according to claim 1, wherein the image input interface is coupled to an external TV decoding device to receive the digital video data stream transmitted by the TV decoding device . 8. The liquid crystal display system with storage function as claimed in claim 7, wherein the digital image data stream is in one of the following formats: YCbCr, RGB format.

Images