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Generally, only one copy of an electronic".',K(K(<<N%" submission must be filed. If multiple docket or rulemaking numbers appear in the caption of this proceeding, however, commenters must transmit one electronic copy of the comments to each docket or rulemaking number referenced in the caption. In completing the transmittal screen, commenters should include their full name, Postal Service mailing address, and the applicable docket or rulemaking number. Parties may also submit an electronic comment by Internet email. To get filing instructions for email comments, commenters should send an email to ecfs@fcc.gov, and should include the following words in the body of the message, "get form ." A sample form and directions will be sent in reply. 21. Parties who choose to file by paper must file an original and four copies of each filing. If more than one docket or rulemaking number appear in the caption of this proceeding, commenters must submit two additional copies for each additional docket or rulemaking number. All filings must be sent to the Commission's Secretary, Magalie Roman Salas, Office of the Secretary, Federal Communications Commission, The Portals, 445 Twelfth Street, S.W., Room TW-A325, Washington, D.C. 20554. 22. Parties who choose to file by paper should also submit their comments on diskette. These diskettes should be submitted to: Neal L. McNeil, Office of Engineering and Technology, Federal Communications Commission, The Portals, 445 Twelfth Street, S.W., Room 7A133, Washington, D.C. 20554. Such a submission should be on a 3.5 inch diskette formatted in an IBM compatible format using WordPerfect 5.1 for Windows or compatible software. The diskette should be accompanied by a cover letter and should be submitted in "read only" mode. The diskette should be clearly labelled with the commenter's name, proceeding (including the lead docket number, in this case ET Docket No. 99254, type of pleading (comment or reply comment), date of submission, and the name of the electronic file on the diskette. The label should also include the following phrase "Disk Copy Not an Original." Each diskette should contain only one party's pleadings, preferably in a single electronic file. In addition, commenters must send diskette copies to the Commission's copy contractor, International Transcription Service, Inc., 1231 20th Street, N.W., Washington, D.C. 20037.  X72 23. Comments and reply comments will be available for public inspection during regular business hours in the Reference Information Center (Room CYA257) of the Federal Communications Commission, The Portals, 445 Twelfth Street, S.W., Washington, D.C. 20554. Copies of comments and reply comments are available through the Commission's duplicating contractor: International Transcription Service, Inc. (ITS, Inc.), 1231 20th Street, N.W., Washington, D.C. 20036, (202) 857-3800, TTY (202) 293-8810.  X"224. Alternative formats (computer diskette, large print, audio cassette and Braille) are available to persons with disabilities by contacting Martha Contee at (202) 4180260, TTY  Xh$2(202) 4182555, or at mcontee@fcc.gov. The Notice can also be downloaded at: http://www.fcc.gov/dtf/.  X<&2 "<&,K(K(<<$"  X2 ORDERING CLAUSES }  X2} 25. IT IS ORDERED that, pursuant to Sections 303(u) and 330(b) of the Communications Act of 1934, as amended, 47 U.S.C. Sections 303(u) and 330(b), this Notice of Proposed Rule Making is hereby ADOPTED. 26. IT IS FURTHER ORDERED that the Commission's Office of Public Affairs Reference Operations Division, SHALL SEND a copy of this Notice of Proposed Rule Making, including the Initial Regulatory Flexibility Act, to the Chief, Counsel for Advocacy of the Small Business Administration.  X 227. For further information concerning this Notice, contact Neal McNeil, Office of Engineering & Technology, (202) 4182408, TTY (202) 4182989, email nmcneil@fcc.gov. X` hp x (#%'0*,.8135@8:t@B#C\  P6QɒP# Screen Aspect RatioMaximum Anchor ppMinimum Anchor  yO(44Position ResolutionppPosition Resolution  yOX(4:3 4475v x 160h pp15v x 32h  yO (16:9 4475v x 210h pp15v x 42h  yO(other 4475v x (5 x H) pp15v x H*  Xx21heading 2Table 18 Minimum Screen Coordinates  64heading 2   yOJ( *H = 32 x (the width of the screen in relation to a 4:3 display). For example, the 16:9 format is 4/3 wider than a 4:3 display; thus, H = 32 * 4/3 = 42.667, or 42. This means that the minimum grid resolution for a 4:3 aspect ratio instrument is 15 vertical positions x 32 horizontal positions. This minimum grid resolution for 16:9 ratio instrument is 15 vertical positions x 42 horizontal positions. These minimum grid sizes are to cover the entire safetitle area of the corresponding screen. The minimum coordinates equate to a 1/5 reduction in the maximum horizontal and vertical grid resolution coordinates. Caption providers are to use the maximum coordinate system values when specifying anchor point positions. Decoders using the minimum resolution are to divide the provided horizontal and vertical screen coordinates by 5 to derive the equivalent minimum coordinates. Any caption targeted for both 4:3 and 16:9 instruments is limited to 32 contiguous characters per row. If a caption is received by a 4:3 instrument that is targeted for a 16:9 display only, or requires a window width greater than 32 characters, then the caption may be completely disregarded by the decoder. 16:9 instruments should be able to process and display captions intended for 4:3 displays, providing all other minimum recommendations are met. If the resulting size of any window is larger than the safe title area for the corresponding displays aspect ratio, then this window will be completely disregarded.  Sz(#&J\  P6Qu&P#  SR(9.6 DTVCC Section 8.4 Caption Windows  yO*(#C\  P6QɒP# Decoders need to display no more than 4 rows of captions on the screen at any given time, regardless of the number of windows displayed. This implies that no more than 4 windows can be displayed at any given time (with each having only one caption row). However, decoders should maintain storage to support a maximum total of 8 rows of captions. This storage is needed for the worstcase support of a displayed window with 4 rows of captioning and a nondisplayed window which is buffering the incoming rows for the next 4row caption. As implied above, the maximum number of windows that may be displayed at any one time by a minimum decoder implementation is 4. If more than 4 windows are defined in the caption stream, the decoder may disregard the youngest and lowest priority window definition(s). Caption providers must be aware of this limitation, and either restrict the total number of windows used or accept that some windows will not be displayed.  S%(#&J\  P6Qu&P# 9.7 DTVCC Section 8.4.2 Window Priority  yO&(#C\  P6QɒP# Decoders do not need to support overlapped windows. If a window overlaps another window, the"',K(K(<<v%H" overlapped window need not be displayed by the decoder. Decoders may support overlapped windows as an option.  SX(#&J\  P6Qu&P# 9.8 DTVCC Section 8.4.6 Window Size  yO0(#C\  P6QɒP# At a minimum, decoders will assume that all windows have rows and columns locked. This implies that if a decoder implements the optional SMALL pensize, then wordunwrapping, when shrinking captions, need not be implemented. Also, if a decoder implements the optional LARGE pen size, then word wrapping (when enlarging captions) need not be implemented.  S(#&J\  P6Qu&P#  S(9.9 DTVCC Section 8.4.8 Word Wrapping  yO(#C\  P6QɒP# Decoders may support word wrapping as an option.  S (#&J\  P6Qu&P# 9.10 DTVCC Section 8.4.9 Window Text Painting  S (9.10.1 Justification  yO (#C\  P6QɒP# For fixedspaced (i.e., nonproportionallyspaced) fonts, all decoders should implement left, right, and centercaptiontext justification, with full justification implementation being optional. Full justification is to be converted to left justification when full justification is not implemented For proportionallyspaced fonts, all decoders should implement left, right and center justification. For center and right justification, decoders need not display any portion of a received row of text until the entire row is received (i.e., until a CR or any nontext related command is received). This easement allows the decoder to calculate the width of a text row before displaying it, and thus, giving the decoder all of the parameters necessary to calculate a reasonable offset of the row within a window to effect center or right justification. Receipt of a character for a displayed row which already contains text and which has already been justified will cause the row to be cleared prior to the display of the newly received character and any subsequent characters. Receipt of a justification command which changes the last received justification for a given window will cause the window to be cleared.  S((#&J\  P6Qu&P#  S(9.10.2 Print Direction  yO(#C\  P6QɒP# At a minimum, decoders must support LEFT_TO_RIGHT printing.  Sh(#&J\  P6Qu&P#  S@(9.10.3 Scroll Direction  yO(#C\  P6QɒP# At a minimum, decoders must support BOTTOM_TO_TOP scrolling. For windows sharing the same horizontal scan lines on the display, scrolling may be disabled.  S8"(#&J\  P6Qu&P#  S#(9.10.4 Scroll Rate  yO#(#C\  P6QɒP# At a minimum, decoders must support the same recommended practices for scroll rate as is provided for NTSC closedcaptioning.  S@&(#&J\  P6Qu&P#  S'(9.10.5 Smooth Scrolling "',K(K(<<$H"Ԍ yO(#C\  P6QɒP#љAt a minimum, decoders must support the same recommended practices for smooth scrolling as is provided for NTSC closedcaptioning.  S(#&J\  P6Qu&P#  Sh(9.10.6 Display Effects  yO@(#C\  P6QɒP#At a minimum, decoders must implement the snap window display effect. If the window fade and wipe effects are not implemented, then the decoder will snap all windows when they are to be displayed, and the  S`(#&J\  P6Qu&P# 9.11 DTVCC Section 8.4.11 Window Colors and Borders  yO8(#C\  P6QɒP# At a minimum, decoders need only to implement borderless windows with solid, black backgrounds (i.e., border type = NONE, fill color = (0,0,0), fill opacity = SOLID), and borderless transparent windows (i.e., border type = NONE, fill opacity = TRANSPARENT).  SX (#&J\  P6Qu&P#  S0 (9.12 DTVCC Section 8.4.12 Predefined Window and Pen Styles  yO (#C\  P6QɒP# Predefined Window Style and Pen Style IDs may be provided in the DefineWindow command. At a minimum, decoders should implement Predefined Window Attribute Style 1 and Predefined Pen Attribute Style 1, as shown in Table 19 and Table 20. "(,K(K(<<LH"  yO( 3'3'Standard'3'3Standard2rJet 5SiN$X !ZZ @@ Addx6< 0  h   >l >  #X\  P6G;ɒP#Style ID #0l Justify0l b Print Ra Direction0l Scroll 3Direction0l J4Word K9Wrap0l Display 7Effect0l Effect MDirection0l Effect Speed0l Fill Color 0l #Fill p[#Opacity 0l &Border 'Type 0l B)Border F*Color 0l .Usageh    >l >  x1J"%LEFTJ"` LEFT b ԩTO Z RIGHT"BOTTOM ԩTO TOP"RzNO"/SNAP"'#n/a"n/a"(0,0,0)  Black "sl#SOLID "&NONE "Pi*n/a ",NTSC Style PopUp g.Captions  0 > > "x2`J"%LEFT`J"` LEFT b ԩTO Z RIGHT"BOTTOM ԩTO TOP"RzNO"/SNAP '#n/a n/a"y n/a "n5#TRANS k#PARENT "&NONE "Pi*n/a ",PopUp Captions w/o -Black Background   > > "x3@ J"CNTR@ J"` LEFT b ԩTO Z RIGHT "BOTTOM ԩTO TOP "RzNO "/SNAP  '#n/a  n/a "(0,0,0)  Black  "sl#SOLID  "&NONE  "Pi*n/a  "-NTSC Style _-Centered PopUp g.Captions   > > "x4 J"%LEFT J"` LEFT b ԩTO Z RIGHT"BOTTOM ԩTO TOP"OTYES"/SNAP '#n/a n/a"(0,0,0)  Black "sl#SOLID "&NONE "Pi*n/a ",NTSC Stlye RollUp g.Captions    > > "x5J"%LEFTJ"` LEFT b ԩTO Z RIGHT"BOTTOM ԩTO TOP"OTYES"/SNAP '#n/a n/a"y n/a "n5#TRANS k#PARENT "&NONE "Pi*n/a ",RollUp Captions w/o -Black Background   > >  x6J"CNTRJ"` LEFT b ԩTO Z RIGHTp"BOTTOM ԩTO TOPp"OTYESp"/SNAPp"'#n/ap"n/ap"(0,0,0)  Black p"sl#SOLID p"&NONE p"Pi*n/a p"-NTSC Stlye Q-Centered RollUp g.Captions    > >  x7"%LEFT"c TOP b ԩTO Q= BOTTOM"oRIGHT ԩTO LEFT"RzNO"/SNAP"'#n/a"n/a"(0,0,0)  Black "sl#SOLID "&NONE "Pi*n/a "-Ticker Tape  p  X2#Xj\  P6G;ynXP#  yOi( #X\  P6G;ɒP#Table 19 Predefined Window Style ID's 9"1 <<j"  yO(9 '3'3Standard2rJet 5SiN$'3'3Standard2rJet 5SiN$X   Addx6< 0  addx6     p > >  2#X\  P6G;ɒP#Prezdefined Style ID # Pen Size Pm Font N[ Style r Offset (Italics !Underline Edge Type yForegrnd Color Foregrnd ;Opacity  \"Backgrnd h,#Color  P&Backgrnd &Opacity  I#*Edge F*Color  .Usage    > >  x1J"STNDRJ"[ 0J" NORMALJ"1rNOJ"NOJ" /NONEJ"(2,2,2) White"LSOLID "d #(0,0,0) h)#Black "&SOLID "Pi*n/a "-Default NTSC .Style*   > > "x2(J"STNDR(J"[ 1(J" NORMAL(J"1rNO(J"NO(J  /NONE(J (2,2,2) White"LSOLID "d #(0,0,0) h)#Black "&SOLID "Pi*n/a ",NTSC Style* Mono .w/Serif   > > "x3@ J"STNDR@ J"[ 2@ J" NORMAL@ J"1rNO@ J"NO@ J  /NONE@ J (2,2,2) White "LSOLID  "d #(0,0,0) h)#Black  "&SOLID  "Pi*n/a  " -NTSC Style* Prop .w/Serif   > > "x4X J"STNDRX J"[ 3X J" NORMALX J"1rNOX J"NOX J  /NONEX J (2,2,2) White "LSOLID  "d #(0,0,0) h)#Black  "&SOLID  "Pi*n/a  ",NTSC Stlye* Mono Q.w/o Serif    > > "x5pJ"STNDRpJ"[ 4pJ" NORMALpJ"1rNOpJ"NOpJ  /NONEpJ (2,2,2) White8"LSOLID 8"d #(0,0,0) h)#Black 8"&SOLID 8"Pi*n/a 8" -NTSC Style* Prop Q.w/o Serif    > >  x6J"STNDRJ"[ 3J" NORMALJ"1rNOJ"NOJ"UNIFRMJ"(2,2,2) WhiteP"LSOLID P"r#n/a P"e&TRANS N&PARENT P"B)(0,0,0) F *Black P"Y-Mono w/o Serif,  -Bordered Text, No /BG   8 > >  x7"%LEFT"[ 4" NORMAL"1rNO"NO"UNIFRM"(2,2,2) White`D"LSOLID `D"r#n/a `D"e&TRANSN&PARENT `D"B)(0,0,0) F *Black `D"l-Prop. w/o Serif,  -Bordered Text, No /BG    X(2#Xj\  P6G;ynXP#  yO(#X\  P6G;ɒP# Table 20 Predefined Pen Style ID's #Xj\  P6G;ynXP# 9  yO(#X\  P6G;ɒP#* NTSC Stlye White Text on Black Background#Xj\  P6G;ynXP#" << "  S( '3'3Standard2rJet 5SiN$3'3'Standard2rJet 5SiN$(X #&J\  P6Qu&P# 9.13 DTVCC Section 8.5.1 Pen Size  yO(#C\  P6QɒP# At a minimum, decoders must support the STANDARD pen size, with the implementation of the LARGE and SMALL pen sizes being optional. The STANDARD pen size should be implemented such that the height of the tallest character in any implemented font is no taller than 1/15 of the height of the safetitle area, and the width of the widest character is no wider than 1/32 of the width of the safetitle area for 4:3 displays and 1/42 of the safetitle area width for 16:9 displays. The LARGE pen size should be implemented such that the width of the widest character in any implemented font is no wider than 1/32 of the safetitle area for 16:9 displays. This recommendation allows for captions to grow to a LARGE pen size without having to reformat the caption since no caption will have more than 32 characters per row (see Section 8.4.6).  S (#&J\  P6Qu&P#  S (9.14 DTVCC Section 8.5.3 Font Styles  yO (#C\  P6QɒP#  yOx (Although a caption service provider may specify any one of 8 font styles using the SetPenAttributes  yO@( command, decoders need only to implement a single font for caption text display. Decoders that implement more than one font but do not support a font style specified in the  yO( SetPenAttributes command should instead display the caption text in the most similar font available. In decoders with only one font (i.e., font style 0, the default), all caption text, regardless of the specified font style, will be displayed in the default font. In decoders with more than one but less than eight fonts, unsupported font styles should be displayed using an alternate font, giving precedence to the spacing attribute of the indicated font style, if possible. For example, if the specified but unsupported font style is monospaced with serifs, the best substitute would be another monospaced font, and the secondbest alternative would be a proportionally spaced font with serifs. If the Cursive font style is not supported, an acceptable substitution is an italicized version of an available font. All supported font styles may be implemented in any typeface which the decoder manufacturer deems to be a readable rendition of the font style, and need not be in the exact typefaces given as examples in Section 8.5.3.  SP(#&J\  P6Qu&P# 9.15 DTVCC Section 8.5.4 Character Offsetting  yO((#C\  P6QɒP# Decoders need not to implement the character offsetting (i.e., subscript and superscript) pen attributes.  S(#&J\  P6Qu&P#  S(9.16 DTVCC Section 8.5.5 Pen Styles  yOh (#C\  P6QɒP# At a minimum, decoders must implement normal, italic, and underline pen styles.  S!(#&J\  P6Qu&P#  S"(9.17 DTVCC Section 8.5.6 Foreground Color and Opacity  yO#(#C\  P6QɒP# At a minimum, decoders must implement solid and flashing character foreground type attributes. At a minimum, decoders must implement the following character foreground colors: white, black, red, green, blue, yellow, magenta and cyan."&,K(K(<<$"Ԍ S(ԙ#&J\  P6Qu&P# 9.18 DTVCC Section 8.5.7 Background Color and Opacity  yO(#C\  P6QɒP# Decoders need only implement solid black character backgrounds. It is recommended that this background is extended beyond the character foreground to a degree that the foreground is separated from the underlying video by a sufficient number of background pixels to insure the foreground is separated from the background.  S(#&J\  P6Qu&P# 9.19 DTVCC Section 8.5.8 Character Edges  yO`(#C\  P6QɒP# Decoders need not to implement separate character edge color, opacity, and type attribute control. In this case, there is no separately controlled edge surrounding the body of characters.  S(#&J\  P6Qu&P#  S (9.20 DTVCC Section 8.8 Color Representation  yOh (#C\  P6QɒP# At a minimum, decoders must support the 8 colors described in Table 21.  yO (  yO (4pL!T$&)\+- 0d247l9;>t@B, <DL!T$&)\+- 0d247l9;>t@BColor Red  QGreen  Blue  yO (Black 0  Q0  0  yOP(White 2  Q2  2  yO(Red 2  Q0  0  yO(Green 0  Q2  0  yO(Blue 0  Q0  2  yOp(Yellow 2  Q2  0  yO8(Magenta 2  Q0  2  yO(Cyan 0  Q2  2  yO(?heading 3, <DL!T$&)\+- 0d247l9;>t@B #FxX  Pg9CSXP# ?Fheading 3  #C\  P6QɒP# Table 21 Minimum Color List Table When a decoder supporting this Minimum Color List receives an RGB value not in the list, it will map the received value to one of the values in the list via the following algorithm:  yOx(  yO@(" All one (1) values are to be changed to 0  yO( " All two (2) values are to remain unchanged  yO( " All three (3) values are to be changed to 2 For example, the RGB value (1,2,3) will be mapped to (0,2,2), (3,3,3) will be mapped to (2,2,2) and (1,1,1) will be mapped to (0,0,0). ",K(K(<<" Table 22 is an alternative minimum color list table supporting 22 colors.  yO(  addx6 ZZXo o o o @@@@    Vp x(08"$&@)+-H024P79hColor  Red  Green   yOX(Blue XBlack 0 0 0 Gray 1 1 1White x2 x2 x2Bright White @3 @3 @3xDark Red 1 0 0@Red 2 0 0Bright Red 3 0 0Dark Green ` 0 ` 1 ` 0Green ( 0 ( 2 ( 0` Bright Green  0  3  0( Dark Blue  0  0  1 Blue  0  0  2 Bright Blue H 0 H 0 H 3 Dark Yellow 1 1 0H Yellow 2 2 0Bright Yellow 3 3 0Dark Magenta h1 h0 h1Magenta 02 00 02hBright Magenta 3 0 30Dark Cyan 0 1 1Cyan 0 2 2Bright Cyan P0 P3 P3  yO(  Table 22 Alternative Minimum Color List Table Đ} When a decoder supporting the Alternative Minimum Color List in Table 22 receives an RGB value not in the list (i.e., an RGB value whose nonzero elements are not the same value), it will map the received value to one of the values in the list via the following algorithm:  yO( " For RGB values with all elements nonzero and different e.g., (1,2,3), (3,2,1), and (2,1,3), the 1 value will be changed to 0, the 2 value will remain unchanged, and the 3 value will be changed to 2.  yO ( " For RGB values with all elements nonzero and with two common elements e.g. (3,1,3), (2,1,2), and (2,2,3), if the common elements are 3 and the uncommon one is 1, then the 1 elements is changed to 0; e.g. (3,1,3) > (3,0,3). If the common elements are 1 and the uncommon element is 3, then the 1 elements are changed to 0, and the 3 element is changed to 2; e.g. (1,3,1) > (0,2,0). In all other cases, the uncommon element is changed to the common value; e.g., (2,2,3) > (2,2,2), (1,2,1) > (1,1,1), and (3,2,3) > (3,3,3). All decoders not supporting either one of the two color lists described above, must support the full 64  {O`"(possible RGB color value combinations.  S*#(#&J\  P6Qu&P#  S$(9.21 Character Rendition Considerations  yO$(#C\  P6QɒP# In NTSC Closed Captioning, decoders were required to insert leading and trailing spaces on each caption row. There were two reasons for this requirement: "2',K(K(<<0%"Ԍ1. to provide a buffer so that the first and last characters of a caption row do not fall outside the safe title area, and 2. to provide a black border on each side of a character so that the white leading pixels of the first character on a row and the trailing white pixels of the last character on a row do not bleed into the underlying video. Since caption windows are required to reside in the safe title area of the DTV screen, reason number 1  yO@((above) is not applicable to DTVCC captions. The attributes available in the SetPenAttributes  yO( command for character rendition (e.g.,character background and edge attributes) provide unlimited flexibilty to the caption provider when describing caption text in an ideal decoder implementation. However, manufacturers need only implement a minimum of pen attributes and font styles. Thus it is recommended that no matter what the level of implementation, decoder manufacturers should take into account the readablility of all caption text against a variety of all video backgrounds, and should implement some automatic character delineation when the individual control of character foreground, background and edge is not supported; and when only a minimum number of font styles are implemented.  S(#&J\  P6Qu&P# 9.22 DTVCC Section 8.9 Service Synchronization  yO(#C\  P6QɒP# Service Input Buffers must be at least 128 bytes in size. Caption providers must keep this lower limit in mind when following Delay commands with other commands and window text. In other words, no more than 128 bytes of DTVCC commands and text should be transmitted (encoded) before a pending Delay commands delay interval expires.  S(#&J\  P6Qu&P# 9.23 DTV to NTSC Transcoders  yOp(#C\  P6QɒP# It is anticipated that receiver (decoder) manufacturers will develop devices (e.g., settop boxes) which process an DTV stream and transcode it for display on NTSC monitors. The DTVCC command set is not necessarily transcodable to NTSC captions; i.e., there are DTVCC captions which have no NTSC equivalent. Although receiver manufacturers are free to attempt an automatic transcode of the captions, there is no guarantee that the captions will appear as the caption provider intended. Caption providers apply many techniques to make the captions easy to read and as unobtrusive as possible over the underlying video. To maintain caption quality during an automated transcode process, a set of conversion rules would have to be defined which cover all possible window, pen and text attribute combinations. Therefore, a separate NTSC caption channel was added to the Picture User Data (see Section 4.3). This channel allows caption providers to encode dual caption streams within the same programming. NTSC captions are under the complete control of the caption provider; and thus, no automated transcoding of captions is necessary.