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Revision 2.2

Page 22

data_type

The 5-bit data_type field indicates what type of data, (DTS, time stamp, etc.) will be found in the
burst.

 

Three values of data_type are defined in this specification.

 

See Table 3.

Table 3 Values of data_type

Value

Meaning

0

Null data

1

DTS data

2

Time Stamp

3-31

Reserved

Reserved bits

Bits 5 and 6 are reserved.

 

These bits shall be set to a value of ‘00’.

 

Receivers of this data

stream may ignore the contents of these bits.

error_flag

The error_flag bit is available to indicate if the contents of the burst contains data errors.

 

If a

data burst is thought to be error free, or if the data source does not know if the data contains
errors, then the value of this bit shall be set to a ‘0’.

 

If the data source does know that a

particular data burst contains some errors this bit may be set to a ‘1’.

 

The use of this bit by

receivers is optional.

data_type_dependent

The data_type_dependent field contains 5 bits whose meaning is intended to be dependent on
the value of data_type.

data_stream_number

The 3-bit data_stream_number indicates to which virtual data stream the burst belongs. Eight
codes (0-7) are available so that up to eight independent data streams (each of any assigned
data type) may be carried in the IEC958 data stream in a time multiplex. Each independent data
stream shall use a unique value for data_stream_type.

In the consumer application the following constraints shall apply.

 

If a single data stream is

carried, the value of data_stream_number shall be 0.

 

If a set of data streams are carried, one of

the streams shall have a data_stream_number of 0.

 

If a receiver is only capable of selecting

and processing a single data stream, it shall receive and process data_stream_number 0.
Stream 0 thus has the highest priority, and should carry the most important data.

 

The MSB of

the 3-bit stream number is placed in bit number 15.

length_code

The length_code indicates the length of the data payload in bits, from 0 to 65535.

 

The size of

the preamble is not counted in the value of length_code.

Summary of Contents for CAE-4

Page 1: ...Revision 2 2 ...

Page 2: ...h 0dB 3dB 6 3 3 3 TC Trig TC bypass 6 3 3 4 Lfe On Lfe Off 6 3 3 5 1509k 754k 6 3 3 7 DVD Status Indicator 6 3 3 8 CD Status Indicator 7 3 3 9 TC Indicator Light 7 3 3 10 READY Light 7 3 3 11 RESET Switch momentary 7 3 4 REAR PANEL CONNECTORS 7 3 4 1 Mains Power with Power On Off Switch 7 3 4 2 Time code Input 8 3 4 3 Bitstream Output 8 3 4 4 L R Digital Audio Input 8 3 4 5 LS RS Digital Audio Inp...

Page 3: ... Professional Decoder 19 7 0 SET UP 19 7 1 MAINS POWER 19 7 2 INTERFACE 19 7 2 1 Inputs 19 7 2 2 Digital Outputs 19 7 3 3 Analog Outputs 19 7 3 STATUS INDICATORS 19 Appendix A 20 Time code embedding specifications 20 A1 0 DTS Bitstream Time code Embedding Specification 20 Coding of preamble 21 Table 1 Preamble Words 21 32 bit mode 21 16 bit mode 21 burst_info 21 Table 2 burst_info 21 data_type 22 ...

Page 4: ...S frames into data bursts 23 1 4 2 The time stamp data_type 24 Figure 1 Encoding audio with time code 24 1 4 3 Preamble values 24 Time stamp payload 24 Figure 2 Time stamps and DTS frames in the IEC958 data stream 26 Table 6 Frame Rate Code 26 Appendix B 27 Compacting files using the Join program 27 DTS Encoding System User Information 27 ...

Page 5: ...ability of content for end users A software playback panel will be available in the upcoming months Until then it may be necessary to use a third party program ie Sound Forge for play back of DTS files directly from your computer A typical application is illustrated in Figure 6 The E175 01 DVD Timecode Controller is described in Section 6 of this manual It is used to sync picture content with audi...

Page 6: ...nt ne depasse pas les limites de Classe A D emission de bruits radioelectriques pour les appareils numeriques telles que perscrites par le Reglement sur le brouillage radioelectrique etabli par le ministere des Communications du Canada L exploitation faite en milieu residentiel peut entrainer le brouillage des receptions radio et television ce qui olbigerait le proprietaire ou l operateur a prendr...

Page 7: ...restricted to repair and or replacement of defective parts Under no circumstances will DTS Inc be liable for any other damage either direct or consequential All requests for repairs or information should include the unit serial number to ensure rapid service DTS OFFICES AND TECHNICAL SUPPORT North America corporate headquarters Telephone 818 706 3525 Fax 818 706 1868 DTS engineers are available to...

Page 8: ... packing material until installation is complete in the unlikely event that a component s requires return to the factory Use the packing slip that came with your unit to verify received inventory The following is a sample packing list for a single system Typical DTS Pro Audio Equipment Package consists of CAE 4 Professional Encoder CAD 4 Decoder E175 DVD Timecode Controller E175 DVD 1 4 Jack to En...

Page 9: ... by setting up E175 01 DVD per section 6 Place CAD 4 into TC trig position to start encoding on user selected start time 3 2 ELECTRICAL SPECIFICATIONS See spec sheets for summary specifications 3 3 FRONT PANEL CONTROLS AND INDICATORS The four pushbuttons from the left have LED indicators to show their status Pressing the button after reset changes the state of the control The only way to set the c...

Page 10: ...ould be entered with a large number up to 24 hours Refer to section 6 for operation of the E175DVD Verify the start and end times are entered on the E175DVD screen The TC Status LED will blink at a 15Hz fast rate before the Encoder trigger point indicating that it is receiving time code and then blink at a 5Hz slow rate after passing the trigger point The TC LED will be off with no time code prese...

Page 11: ...s present and since reset was last pressed encoding has started and has been continuous Blinking Since reset was last pressed encoding has started and then stopped for any amount of time If encoding restarted LED will continue to blink until the encoder is reset again Off Encoding is not occurring Normal for a few seconds after RESET has been pressed 3 3 11 RESET Switch momentary Forces the encode...

Page 12: ...ms 3 4 5 LS RS Digital Audio Input 3 pin XLR female AES EBU 110 ohms 3 4 6 Center SubWoofer Digital Audio Input 3 pin XLR female AES EBU 110 ohms 3 4 7 Input Channel Mapping The AES input pairs channel assignments are fixed Should you have a different input pair arrangement you may need a router to format the source material accordingly to accommodate the input pairs specified in 3 4 4 3 4 6 ...

Page 13: ...r k s ta tio n F ig u re 4 1 1 G e n e ric E n c o d in g S e tu p First source material must be supplied to the encoder as three AES EBU digital inputs plus time code The encoded bit stream is then sent to an AES digital bitsteam capture workstation As the following examples illustrate the source material can be provided from digital recorders and digital audio workstations The recording device i...

Page 14: ... of a Tascam DA88 is converted by a Tascam IF88AE into the three AES EBU channels required by the encoder L R LS RS C SUB The TC OUT of the DA88 is connected to the E175directly to the Encoder TC IN The BITSTREAM OUT of the encoder is connected to the DIGITAL INPUT of the DTS CAD 4 Decoder where it is converted back into L R LS RS C SUB AES formatted outputs These three outputs are monitored by an...

Page 15: ...w encoding rate CD source material 44 1k will always be encoded at 1234kbps Select TC BYPASS TC TRIGGER Press Reset The audio from the DA88 which has been encoded then decoded will now be available at the meter bridge and the monitors Figure 4 1 3 shows a DA88 source and an IBM Compatible workstation with a Sek d PRODIF 96Pro digital sound card as a recorder If the encoder is set to TC Trigger one...

Page 16: ...C W o rk s ta tio n Select the bit depth and weather the surround are ES encoded Click on CHECK on the Panel program An edit box will summarize the Format bit rate start and stop time codes 4 2 AUTHORING SYSTEMS SUPPORT We are working to certify the following authoring systems for DTS Contact your authoring system provider if you have any questions regarding the interface Daikin Scenarist Spruce T...

Page 17: ...yzed for dropouts and other syntax errors by using the check function on the panel The edit function can then be used to properly format the bitsteam to accommodate the CD or DVD authoring system and can be used to trim the beginning and end of the file as needed A project file prj is created that details all of the actions taken by the PANEL program The project file can be opened with The followi...

Page 18: ...ocess Flow 5 1 2 Optional Dos Utilities 5 1 2 1 DTS Expand The DTSExpand is a DOS program This program will create a new padded DTS file from a compacted CPT and file outputs a padded file Syntax Expand path file source name cpt path output filename dts The Expand program will require the frame size information listed below Prompt for the source file DTS framesize Rate kbps Compacted Frame Size 15...

Page 19: ...S 2Bin is a DOS program The bin2wave will convert a padded file to a wave file 5 1 3 3 DTS2CPT Syntax DS2cpt path source filename dts path output filename cpt DTS2cpt will create a new padded dts file compacted cpt file padded bin2wave wav file ...

Page 20: ...t the 9VDC output of the converter labeled 9VDC 500ma Note center pin is 9V and the outside ring is ground into the rear of the E175 01 DVD Attach a chassis ground to the rear of the unit or if rack mounted verify chassis ground continuity 6 2 2 Signal Plug a jack stereo or mono from the time code source to the time code input 1 rear input jack Signal Name Using TRS Plug Using A Phono Plug Time Co...

Page 21: ...on may be required If any of the display locations show a then zero out the display before entering numeric start stop data NOTE When keeping the DISPLAY button pressed and then pressing the up button one can scroll the numbers in the reverse direction Also keeping the up button pressed will cause the numbers to auto increment Upon achieving the correct start time press STORE Then press the DISPLA...

Page 22: ...he E175DVD reaches the Start time Before the E175DVD start point the Encoder TC LED with blink fast 15Hz then at the trigger point the TC LED will blink slow 5Hz and the READY LED will be solid on The upper right hand corner of the display indicates the frames per second ie 30 25 dp ...

Page 23: ... available these are Optical 75 ohm or Balanced Digital XLR Press the digital input selector switch IN for 75 ohm OR press the digital input selector OUT for Balanced Digital XLR 7 2 2 Digital Outputs The 3 AES EBU outputs are paired as Center Sub SurrR SurrL Right Left 7 3 3 Analog Outputs All analog outputs are balanced XLR 7 3 STATUS INDICATORS The Power status monitors the presence of Mains po...

Page 24: ...842 000000A0 2222 4220 OOO0 OOO0 OOD0 OOD0 OOD0 00D0 000000B0 EA80 A1 0 DTS Bitstream Time code Embedding Specification The purpose of this specification is to define how the DTS bitstream incorporates time code embedding time stamping into a single bit stream The majority of this information is extracted from the Advanced Television Systems Committee standard describing time code stamping and is ...

Page 25: ... equal to the number of data bits in the following data burst 32 bit mode The 4 preamble words are contained in 2 sequential frames The frame beginning the data burst contains preamble word Pa in the Ch1 sub frame and Pb in the Ch2 sub frame The next frame contains Pc in Ch1 and Pd in Ch2 16 bit mode The 4 preamble words are contained in 4 sequential sub frames of the individual channel Ch1 or Ch2...

Page 26: ...eld contains 5 bits whose meaning is intended to be dependent on the value of data_type data_stream_number The 3 bit data_stream_number indicates to which virtual data stream the burst belongs Eight codes 0 7 are available so that up to eight independent data streams each of any assigned data type may be carried in the IEC958 data stream in a time multiplex Each independent data stream shall use a...

Page 27: ... long periods of inactivity which may be autodetected as PCM silence Placement of null data bursts allows sync codes to be detected allowing an autodetector to realize that the sub frame contents should be considered to be data and not PCM audio Thus use of null data bursts is optional The DTS data_type When DTS data is conveyed data_type has a value of 0x1 In this case the value of data_type_depe...

Page 28: ... Encoder Audio Signals to be encoded SMPTE Time Code DTS Bitstream Coded audio time code Figure 1 Encoding audio with time code 1 4 3 Preamble values Time stamps are conveyed by data bursts with a data_type value of 0x2 The value of data_type_dependent shall be set to 0x0 for the payload defined below In the future other payload types may be defined for different values of data_type_dependent The ...

Page 29: ...nutes seconds frame count Space is available to carry the user group color frame flag drop frame flag and unassigned bits from a SMPTE time code word Flag bit f1 in word 5 is set to a 1 if this information has been copied from a source of SMPTE time code into the upper bits of payload words 0 3 If flag bit f1 is set to a 0 this information has not been provided and the upper bits of payload words ...

Page 30: ...ame Rate Code Frame Rate a3 a2 a1 a0 0 0 0 0 not indicated 0 0 0 1 24 1001 23 98 0 0 1 0 24 0 0 1 1 25 0 1 0 0 30 1001 29 97 0 1 0 1 30 0 1 1 0 50 0 1 1 1 60 1001 59 94 1 0 0 0 60 reserved 1 1 1 1 reserved Additional payload words containing arbitrary information may be optionally provided The meaning of any additional payload information is not specified Receivers should be capable of operating w...

Page 31: ...on a continuous file needs to be created from and you have access to a PC and can run a DOS program you can use the attached executable file to generate a compacted file directly from the padded file 1 Place a copy of the Join program in the same folder as your source padded file 2 In DOS navigate to the folder with the files 3 Type Join then press enter key 4 Enter the code for the frame rate 5 A...

Page 32: ...lications Only one sound card should be installed in the PC and it should not be sharing its IRQ with another card Certain types of video cards can take over data transfers on the bus If possible an AGP video board should be used as these do not rob resources from data transfers If this is not possible and dropouts occur the display should be set to its minimum performance setting usually VGA All ...

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