SMPTE ST 2036-2-2008 Ultra High Definition Television1 Audio Characteristics and Audio Channel Mapping for Program Production.pdf

1、 Copyright 2008 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved July 9, 2008 Table of Contents Page Foreword . 2 Intellectual Property 2 Introduction . 2 1 Scope . 3 2 Conformance Notation . 3 3 Normative References . 3 4 Defi

2、nition of Terms. 3 5 Digital Signal Characteristics . 3 6 Channel Mapping and Channel Labeling of 22.2 Multichannel Audio . 3 7 Loudspeaker Layout (Informative) 3 Annex A Bibliography (Informative) . 7 1Ultra High Definition Television - UHDTV Page 1 of 8 pages SMPTE 2036-2-2008SMPTE STANDARD Ultra

3、High Definition Television1 Audio Characteristics and Audio Channel Mapping for Program Production SMPTE 2036-2-2008 Page 2 of 8 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an internationally-recognized standards developing organization. Headquartered and incorpo

4、rated in the United States of America, SMPTE has members in over 80 countries on six continents. SMPTEs Engineering Documents, including Standards, Recommended Practices, and Engineering Guidelines, are prepared by SMPTEs Technology Committees. Participation in these Committees is open to all with a

5、 bona fide interest in their work. SMPTE cooperates closely with other standards-developing organizations, including ISO, IEC and ITU. SMPTE Engineering Documents are drafted in accordance with the rules given in Part XIII of its Administrative Practices. SMPTE Standard 2036-2 was prepared by Techno

6、logy Committee A29. Intellectual Property At the time of publication no notice had been received by SMPTE claiming patent rights essential to the implementation of this Standard. However, attention is drawn to the possibility that some of the elements of this document may be the subject of patent ri

7、ghts. SMPTE shall not be held responsible for identifying any or all such patent rights. Introduction SMPTE 2036 Ultra High Definition Television (UHDTV) suite of documents is in multiple parts: Part 1: Image Parameter Values for Program Production Part 2: Audio Characteristics and Audio Channel Map

8、ping for Program Production This document is Part 2 of SMPTE 2036 and describes the audio characteristics and audio channel mapping for program production. Part 1 specifies the family of progressive image sample structures for UHDTV program production. The channel-mapping and labeling scheme describ

9、ed in this document is intended for UHDTV and specifies the channel-mapping and labeling for 24 audio channels. This mapping takes into account historical practice and standards work of both SMPTE and ITU-R. SMPTE 2036-2-2008 Page 3 of 8 pages 1 Scope This document specifies the characteristics of d

10、igital audio for UHDTV program production and distribution. This document also defines the mapping and labeling of 22.2 multichannel audio for UHDTV program production. 2 Conformance Notation Normative text is text that describes elements of the design that are indispensable or contains the conforma

11、nce language keywords: “shall“, “should“, or “may“. Informative text is text that is potentially helpful to the user, but not indispensable, and can be removed, changed, or added editorially without affecting interoperability. Informative text does not contain any conformance keywords. All text in t

12、his document is, by default, normative, except: the Introduction, any section explicitly labeled as “Informative“ or individual paragraphs that start with “Note:” The keywords “shall“ and “shall not“ indicate requirements strictly to be followed in order to conform to the document and from which no

13、deviation is permitted. The keywords, “should“ and “should not“ indicate that, among several possibilities, one is recommended as particularly suitable, without mentioning or excluding others; or that a certain course of action is preferred but not necessarily required; or that (in the negative form

14、) a certain possibility or course of action is deprecated but not prohibited. The keywords “may“ and “need not“ indicate courses of action permissible within the limits of the document. The keyword “reserved” indicates a provision that is not defined at this time, shall not be used, and may be defin

15、ed in the future. The keyword “forbidden” indicates “reserved” and in addition indicates that the provision will never be defined in the future. A conformant implementation according to this document is one that includes all mandatory provisions (“shall“) and, if implemented, all recommended provisi

16、ons (“should“) as described. A conformant implementation need not implement optional provisions (“may“) and need not implement them as described. 3 Normative References The following standard contains provisions which, through reference in this text, constitute provisions of this standard. At the ti

17、me of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. AES3-2003, AES Standard for Digital Audio Eng

18、ineering Digital Input-Output Interfacing Serial Transmission Format for Two-Channel Linearly Represented Digital Audio Data (Revision of AES3-1992) 4 Definition of Terms UHDTV: Ultra High Definition Television, having an image format (sample structure) of 3840 2160 or 7680 4320 at a frame rate of 5

19、0P, 59.94P or 60P. UHDTV1: Class of UHDTV having an image format (sample structure) of 3840 2160 at a frame rate of 50P, 59.94P or 60P. SMPTE 2036-2-2008 Page 4 of 8 pages UHDTV2: Class of UHDTV having an image format (sample structure) of 7680 4320 at a frame rate of 50P, 59.94P or 60P. 22.2 multic

20、hannel audio: A multichannel audio system for UHDTV, which has three loudspeaker layers vertically (Top layer, Middle layer and Bottom layer). The 22.2 audio channels consist of 22 full-bandwidth channels and 2 LFE (Low Frequency Effects) channels. (An informative diagram of 22.2 multichannel audio

21、system is shown in section 7.) Top layer: Top (highest) layer of three loudspeaker-layers located at the top of the screen. (Alternatively at the top of the room.) Middle layer: Middle layer of three loudspeaker-layers located at the vertical center of the television screen (Alternatively at the sam

22、e height as the height of viewers ear.) Bottom layer: Bottom (lowest) layer of three loudspeaker-layers located at the bottom of the television screen. (Alternatively at floor level of the room.) Front left: A loudspeaker position located at far left and centered vertically with the middle layer. Fr

23、ont right: A loudspeaker position located at far right and centered vertically with the middle layer. Front center: A loudspeaker position located at the middle layer corresponding to the center of the television screen as viewed from the seating area. LFE-1: A Low Frequency Effects (band-limited lo

24、w frequency channel) loudspeaker position located at the bottom layer and normally far left front, when LFE-2 is used. Back left: A loudspeaker position located at far left back of the middle layer. Back right: A loudspeaker position located at far right back of the middle layer. Front left center:

25、A loudspeaker position located mid-way between the front center and front left of the middle layer. Front right center: A loudspeaker position located mid-way between the front center and front right of the middle layer. Back center: A loudspeaker position located at center back of the middle layer.

26、 LFE-2: A Low Frequency Effects (band-limited low frequency channel) loudspeaker position located at the bottom layer, and is normally at far right front of the bottom layer, when LFE-1 is used. Side left: A loudspeaker position located at left side of the middle layer. Side right: A loudspeaker pos

27、ition located at right side of the middle layer. Top front left: A loudspeaker position located at far left front of the top layer. Top front right: A loudspeaker position located at far right front of the top layer. Top front center: A loudspeaker position located at center front of the top layer.

28、Top center: A loudspeaker position located at the center of the top layer directly above the seating area. Top back left: A loudspeaker position located at far left back of the top layer. SMPTE 2036-2-2008 Page 5 of 8 pages Top back right: A loudspeaker position located at far right back of the top

29、layer. Top side left: A loudspeaker position located at left side of the top layer. Top side right: A loudspeaker position located at right side of the top layer. Top back center: A loudspeaker position located at center back of the top layer. Bottom front center: A loudspeaker position located at c

30、enter front of the bottom layer. Bottom front left: A loudspeaker position located at far left front of the bottom layer. Bottom front right: A loudspeaker position located at far right front of the bottom layer. 5 Digital Signal Characteristics 5.1 Sampling Frequency UHDTV audio shall support a sam

31、pling frequency of 48 kHz locked (synchronous) to video. UHDTV audio may additionally support a sampling frequency of 96 kHz locked (synchronous) to video for UHDTV program production. Audio sample rate jitter shall be as specified in AES3. 5.2 Bit Depth The bit depth shall be one of 16 bits or, 20

32、bits or, 24 bits per sample. 5.3 Audio Channels UHDTV audio shall support a channel count of 24 full-bandwidth channels. Note: The two LFE channels are transported as full-bandwidth channels. 5.4 Emphasis The audio signals carried by UHDTV shall not use AES-3 frequency pre-emphasis. 5.5 AES3 Channel

33、 Status, Validity Bit and User Bits Channel status data, Validity bit and User data bits specified in AES3 shall be carried through the path from origination to emission. 6 Channel Mapping and Channel Labeling of 22.2 Multichannel Audio Channel numbers listed refer to the input and output interfaces

34、 of a UHDTV audio system. AES3 pairs and channel one or two in the pair shall be mapped in accordance with the table below. Labels shall be retained throughout the audio chain. SMPTE 2036-2-2008 Page 6 of 8 pages Table 1 Channel maps and labels of 22.2 multichannel audio AES Pair No./Ch No. Channel

35、No. Label Name 1/1 1 FL Front left 1/2 2 FR Front right 2/1 3 FC Front center 2/2 4 LFE1 LFE-1 3/1 5 BL Back left 3/2 6 BR Back right 4/1 7 FLc Front left center 4/2 8 FRc Front right center 5/1 9 BC Back center 5/2 10 LFE2 LFE-2 6/1 11 SiL Side left 6/2 12 SiR Side right 7/1 13 TpFL Top front left

36、7/2 14 TpFR Top front right 8/1 15 TpFC Top front center 8/2 16 TpC Top center 9/1 17 TpBL Top back left 9/2 18 TpBR Top back right 10/1 19 TpSiL Top side left 10/2 20 TpSiR Top side right 11/1 21 TpBC Top back center 11/2 22 BtFC Bottom front center 12/1 23 BtFL Bottom front left 12/2 24 BtFR Botto

37、m front right SMPTE 2036-2-2008 Page 7 of 8 pages 7 Loudspeaker Layout (Informative) The figure below illustrates the loudspeaker layout of a 22.2 multichannel sound system. SMPTE 2036-2-2008 Page 8 of 8 pages Annex A (Informative) Bibliography AES5-2003, Preferred Sampling Frequencies for Applicati

38、ons Employing Pulse-code Modulation ITU-R BS.775-2, Multichannel Stereophonic Sound System with and without Accompanying Picture SMPTE 299M-2004, Television 24-Bit Digital Audio Format for SMPTE 292 Bit-Serial Interface SMPTE 2036-1-2007, Ultra High Definition Television Image Parameter Values for Program Production SMPTE EG 32-1996, Emphasis of AES/EBU Audio in Television Systems and Preferred Audio Sampling Rate