Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

BGRToCbYCr422_709HDTV

Converts BGR image to 16-bit per pixel CbYCr image for ITU-R BT.709 HDTV signal.

Syntax

IppStatus ippiBGRToCbYCr422_709HDTV_8u_C3C2R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
, int
dstStep
, IppiSize
roiSize
);
IppStatus ippiBGRToCbYCr422_709HDTV_8u_AC4C2R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
, int
dstStep
, IppiSize
roiSize
);
Include Files
ippcc.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
,
ipps.h
,
ippi.h
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.lib
,
ippi.lib
Parameters
pSrc
Pointer to the source image ROI.
srcStep
Distance in bytes between starts of consecutive lines in the source image.
pDst
Pointer to the destination image ROI.
dstStep
Distance in bytes between starts of consecutive lines in the destination image.
roiSize
Size of the source and destination ROI in pixels.
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function converts the three- or four-channel gamma-corrected
B'G'R'
image
pSrc
to the two-channel
Cb'Y'Cr'
image
pDst
for digital component video signals complied with the ITU-R BT.709 Recommendation [ITU709] for high-definition TV (HDTV). The source image pixel values are in the range [16..235]. The conversion is performed according to the following formulas [Jack01]:
Y' = 0.213*R' + 0.715*G' + 0.072*B'
Cb' = -0.117*R' - 0.394*G' + 0.511*B' + 128
Cr' = 0.511*R' - 0.464*G' - 0.047*B' + 128
The values of
Y'
of the destination image are in the range [16..235], the values of
Cb'
,
Cr'
are in the range [16..240]. They should be saturated at the 1 and 254 levels.
The function
ippiBGRToCbYCr422_709HDTV
uses the
4:2:2 sampling
format for the converted image. The alpha-channel information is lost.
A
CbYCr
image has the following sequence of bytes:
Cb0Y0Cr0Y1
,
Cb1Y2Cr1Y3
, ... .
Return Values
ippStsNoErr
Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr
Indicates an error condition if
pSrc
or
pDst
pointer is
NULL
.
ippStsSizeErr
Indicates an error condition if
roiSize
has a field with a zero or negative value.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804