BT.656 Video Capture Mode

Table 3–4. Error Correction by Protection Bits (Continued)

Received F, V, and H Bits

Received

 

 

 

 

 

 

 

 

000

001

010

011

100

101

110

111

P3–P0Bits

0111

100

011

100

100

100

1000

000

101

110

1001

001

010

111

1010

101

010

101

101

101

1011

010

010

010

101

010

1100

001

110

110

110

110

1101

001

001

001

001

110

1110

011

101

110

1111

001

010

100

 

 

 

 

 

 

 

 

 

3.2.3BT.656 Image Window and Capture

The BT.656 format is an interlaced format consisting of two fields. The video port allows capture of one or both fields. The captured image is a subset of each field and can be larger or smaller than the active video region. The cap- tured image position is defined by the VCxSTRT1 and VCxSTOP1 registers for field 1, and the VCxSTRT2 and VCxSTOP2 registers for field 2. The VCXSTART and VCXSTOP bits set the horizontal window position for the field relative to the HCOUNT pixel counter. The VCYSTART and VCYSTOP bits set the vertical position relative to the VCOUNT line counter. This is shown in Figure 3–1.

HCOUNT increments on every chroma sample period (every other VCLKIN rising edge) for which capture is enabled. Once VCOUNT = VCYSTART, line capture begins when HCOUNT = VCXSTART. It continues until HCOUNT = VCXSTOP. A field’s capture is complete when HCOUNT = VCXSTOP and

VCOUNT = VCYSTOP.

3-6

Video Capture Port

SPRU629

Page 68
Image 68
Texas Instruments TMS320C64x DSP manual 3 BT.656 Image Window and Capture, 010 011 100 101, P 0 Bits

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.