CN201904086U - A device that can provide H.264 real-time decoding for SD players - Google Patents

Abstract

The utility model discloses a device capable of providing H.264 real-time decoding for a standard definition player, characterized in that: a USB interface is provided, a signal input/output interface is connected to the USB interface, the signal input/output interface is connected to a media processor through a signal processing unit, and an external memory is connected to the media processor. The structure is simple, and the standard definition player can be provided with identifiable H.264 real-time decoding, so that the standard definition player can play high-definition discs, and users of the standard definition player can enjoy high-definition images without purchasing high-definition media, which is very convenient.

Description

A device that can provide H.264 real-time decoding for SD players

Technical field:

The utility model relates to a real-time decoding device, in particular to a device with simple structure which can provide H.264 real-time decoding for standard definition players.

Background technique:

At present, with the rapid development of the AV industry, high-definition media has entered the lives of ordinary people. Since the high-definition media plays H.264-encoded high-definition discs, and the existing SD players cannot recognize H.264 encoding, the existing SD players cannot play high-definition discs, and users cannot enjoy high-definition images. , feeling inconvenient.

Invention content:

The utility model aims to solve the technical problem that the standard-definition player cannot play high-definition discs in the prior art, and provides a device that can provide H.264 real-time decoding for the standard-definition player.

The technical solution of the utility model is: a device that can provide H.264 real-time decoding for standard definition players, is provided with a USB interface, and has a signal input/output interface connected to the USB interface, and the signal input/output interface is processed through signal processing. The unit is connected with the media processor, and an external memory is connected with the media processor.

The utility model has a simple structure, and can provide real-time H.264 decoding that can be recognized by the SD player, so that the SD player can play HD discs, and users of the SD player can enjoy high-definition images without purchasing high-definition media, which is very convenient .

Description of drawings:

Fig. 1 is the circuit principle block diagram of the utility model embodiment.

Detailed ways:

The specific embodiment of the utility model will be described below in conjunction with the accompanying drawings. As shown in Figure 1: there is a USB interface, and there is a signal input/output interface (ITU-R BT.601/656 interface) connected to the USB interface, and the signal input/output interface passes through the signal processing unit (A/D, D/ A conversion, etc.) is connected to the media processor (Hi3510 chip), and an external memory (SDR SDRAM or DDR SDRAM) is connected to the media processor. The media processor (Hi3510 chip) is an outsourced chip, mainly composed of ARM926, 32-bit DSP, H.264 video decoding accelerator, DMA controller and video output unit.

work process:

During use, the USB interface of the utility model is connected with the USB terminal of the standard-definition player, and the high-definition disc encoded by H.264 is inserted into the standard-definition player. The main controller of the standard definition player transmits the audio and video data to the media processor after being processed by the USB interface, the signal input/output interface and the signal processing unit. The 32-bit DSP in the media processor collects, transforms, filters, evaluates, enhances, compresses, and recognizes the information, and then writes the processed audio and video information into the external memory through the DMA controller. H. 264 video decoding accelerator reads images from external memory, and performs motion estimation (inter prediction), intra prediction, DCT transformation, quantization, entropy coding (CAVLC+Exp-Golomb), IDCT transformation, inverse quantization, motion compensation, etc. Operation, and finally write the bare code stream and coded reconstruction frame (as the reference frame of the next frame) conforming to the H.264 protocol into the external memory. The video output unit reads the image from the external memory and uses the DMA controller to transmit the data to the signal input/output interface, and finally transmits the decoded audio and video information to the main controller of the player through the USB interface, which is displayed on the display HD portraits.

The image content read by the video output unit from the external memory depends on the application requirements. When the input image needs to be previewed, the video output unit reads the original image from the external memory. When it is necessary to observe the encoding effect of the video encoder , the video output unit reads the encoded and reconstructed frames from the external memory, and the ARM926 encapsulates the code stream output by the video encoder with a protocol stack, and then transmits the data through the USB port.

Claims (1)

1. one kind can be the SD player the H.264 device of real-time decoding is provided, it is characterized in that: be provided with USB interface, be connected to the signal input/output interface with USB interface, the signal input/output interface joins by signal processing unit and Media Processor, is connected to external memory storage with Media Processor.

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