Video Processing Back-End Vpbe | Texas Instruments TMS320DM355

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TMS320DM355

Digital Media System-on-Chip (DMSoC)

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SPRS463A –SEPTEMBER 2007 –REVISED SEPTEMBER 2007

Table 5-20. Switching Characteristics Over Recommended Operating Conditions for VPFE (CCD) Master

Mode (see Figure 5-26)

NO.		PARAMETER	DM355		UNIT
NO.		PARAMETER	MIN	MAX	UNIT
			MIN	MAX
18	td(PCLKL-HDIV)	Delay time, PCLK edge to HD invalid	3	11	ns
20	td(PCLKL-VDIV)	Delay time, PCLK edge to VD invalid	3	11	ns

PCLK (NegativeEdgeClocking)

PCLK (PositiveEdgeClocking)

Figure 5-26. VPFE (CCD) Master Mode Control Output Data Timing

5.9.2Video Processing Back-End (VPBE)

The Video Processing Back-End of VPBE module is comprised of the On Screen Display (OSD) module and the Video Encoder / Digital LCD Controller (VENC/DLCD).

5.9.2.1 On-Screen Display (OSD)

The primary function of the OSD module is to gather and blend video data and display/bitmap data and then pass it to the Video Encoder (VENC) in YCbCr format. The video and display data is read from external DDR2/mDDR memory. The OSD is programmed via control and parameter registers. The following are the primary features that are supported by the OSD.

∙Support for two video windows and two OSD bitmapped windows that can be displayed simultaneously (VIDWIN0/VIDWIN1 and OSDWIN0/OSDWIN1).

∙Video windows supports YCbCr data in 422 format from external memory, with the ability to interchange the order of the CbCr component in the 32-bit word

∙OSD bitmap windows support 1/2/4/8 bit width index data of color palette

∙In addition one OSD bitmap window at a time can be configured to one of the following:

–YUV422 (same as video data)

–RGB format data in 16-bit mode (R=5bit, G=6bit, B=5bit)

–24-bit mode (each R/G/B=8bit) with pixel level blending with video windows

∙Programmable color palette with the ability to select between a RAM/ROM table with support for 256 colors.

∙Support for 2 ROM tables, one of which can be selected at a given time

∙Separate enable/disable control for each window

∙Programmable width, height, and base starting coordinates for each window

∙External memory address and offset registers for each window

∙Support for x2 and x4 zoom in both the horizontal and vertical direction

∙Pixel-level blending/transparency/blinking attributes can be defined for OSDWIN0 when OSDWIN1 is configured as an attribute window for OSDWIN0.

∙Support for blinking intervals to the attribute window

∙Ability to select either field/frame mode for the windows (interlaced/progressive)

∙An eight step blending process between the bitmap and video windows

∙Transparency support for the bitmap and video data (when a bitmap pixel is zero, there will be no

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Peripheral Information and Electrical Specifications

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TMS320DM355 specifications

The Texas Instruments TMS320DM355 is a versatile digital signal processor designed to support a wide array of multimedia applications, specifically in the realms of digital video and audio processing. As part of the TMS320 family of digital signal processors, the DM355 brings a blend of computational power, energy efficiency, and integrated features that make it highly effective for tasks such as video encoding, decoding, and general signal processing.

One of the standout features of the DM355 is its advanced DaVinci architecture, which is specifically optimized for multimedia tasks. This architecture integrates both DSP and application processing functionalities. The dual-core architecture includes a high-performance DSP core that specializes in real-time signal processing alongside an ARM926EJ-S RISC microprocessor, facilitating the execution of complex algorithms and control tasks.

The DM355 offers robust multimedia processing capabilities with support for several video formats, including MPEG-2, MPEG-4, H.264, and JPEG. This enables developers to create powerful video applications for a variety of devices, from industrial systems to consumer electronics. Its processing capabilities extend to audio processing, allowing it to efficiently handle audio codecs and enhance audio quality in applications ranging from IP cameras to set-top boxes.

In terms of connectivity, the TMS320DM355 supports various interfaces including USB 2.0, Ethernet, and various serial interfaces like UART, SPI, and I2C. This wide range of connectivity options ensures that the DM355 can easily interface with different peripherals and network components, making it a suitable choice for networked applications.

Energy efficiency is another significant advantage of the DM355. With a focus on low power consumption, the device is designed to operate effectively in battery-powered and heat-sensitive environments. Its low thermal design power allows for extended operational life and reduced thermal management requirements, making it ideal for portable devices.

Furthermore, the DM355 is supported by a comprehensive software development framework, including the TI Code Composer Studio and a range of middleware tools, which streamline application development and speed up time to market. Its rich ecosystem enhances its usability across different applications, ensuring that developers can leverage the full potential of the hardware.

In summary, the Texas Instruments TMS320DM355 stands out as a powerful yet cost-effective DSP solution, combining advanced multimedia processing capabilities, robust connectivity options, and energy efficiency. Its unique architecture and extensive support resources make it a preferred choice for developers seeking to create innovative multimedia solutions.

Texas Instruments TMS320DM355 warranty Video Processing Back-End Vpbe, On-Screen Display OSD

Models: TMS320DM355