Video Output Filtering

4.4 Video Output Filtering

The video output filter performs simple hardware scaling and resampling on outgoing 8-bit BT.656 or 8-bit Y/C data. Filtering hardware is disabled during 10-bit or raw data display modes.

4.4.1Output Filter Modes

The output filter has four modes of operation: no-filtering, 2⋅ scaling, chromi- nance resampling, and 2⋅ scaling with chrominance resampling. Filter opera- tion is determined by the DMODE, SCALE, and RESMPL bits of the VDCTL.

Table 4–3 shows the output filter mode selection. When 8-bit BT.656 or Y/C display operation is selected, (DMODE = x00), scaling is selected by setting the SCALE bit and chrominance resampling is selected by setting the RESMPL bit. If 8-bit BT.656 or Y/C display is not selected (DMODE ≠ x00), filtering is disabled.

Table 4–3. Output Filter Mode Selection

 

VDCTL Bit

 

 

DMODE

RESMPL

SCALE

Filter Operation

 

 

 

 

x00

0

0

No filtering

x00

0

1

2⋅ scaling

x00

1

0

Chrominance resampling (full scale)

x00

1

1

2⋅ scaling with chrominance resampling

x01

x

x

No filtering

x10

x

x

No filtering

x11

x

x

No filtering

 

 

 

 

SPRU629

Video Display Port

4-21

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Texas Instruments TMS320C64x DSP Video Output Filtering, Output Filter Modes, Output Filter Mode Selection, Vdctl Bit
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TMS320C64x DSP specifications

The TMS320C64x DSP family from Texas Instruments represents a significant milestone in the realm of digital signal processing. Launched as part of the C6000 series, the C64x DSPs are designed for high-performance applications requiring intensive computational capabilities, such as telecommunications, audio processing, video processing, and industrial control systems.

One of the standout features of the TMS320C64x DSP is its VLIW (Very Long Instruction Word) architecture, which allows for an exceptionally high level of parallelism. This architecture enables multiple instructions to be executed simultaneously, boosting the overall throughput and allowing for complex data processing tasks to be completed more quickly than with conventional DSPs.

The C64x DSPs also boast an impressive clock frequency range, typically up to 1 GHz, delivering substantial computational power for real-time processing goals. Additionally, these processors feature extensive on-chip memory, including L1 and L2 cache, which significantly enhances data access speeds and helps reduce bottlenecks during high-demand processing tasks.

Another key characteristic of the TMS320C64x family is its support for advanced instruction sets optimized for specific applications. These include SIMD (Single Instruction, Multiple Data) capabilities, allowing for efficient handling of large datasets often involved in multimedia processing or complex signal manipulation.

For connectivity, these DSPs often integrate advanced interfaces such as EMIF (External Memory Interface) and McBSP (Multichannel Buffered Serial Port), facilitating seamless interaction with a variety of peripheral devices. This ensures that the DSP can suit different application needs and integrate well into various system architectures.

Texas Instruments emphasizes low power consumption with the C64x DSPs, making them ideal for portable or energy-sensitive applications. Advanced power management techniques and technologies, such as dynamic voltage and frequency scaling, are incorporated to further enhance energy efficiency without compromising performance.

In summary, the Texas Instruments TMS320C64x DSP family stands out due to its high-performance capabilities driven by a VLIW architecture, high clock speeds, extensive memory options, a rich instruction set, and advanced connectivity features, all while maintaining power efficiency. These characteristics make it an exceptional choice for developers looking to integrate robust digital signal processing into their applications, whether in telecommunications, audio and video processing, or embedded control systems.
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