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  • ADT公司G729 方案指标

    ADT公司G729 方案指标

    G.729 Voice Compression Algorithm and its many annexes

    G.729 is used in wireless voice, voice-over-packet-networks, multimedia, and voice circuit multiplexing applications.

    FEATURES

    1. Functions are C-callable.
    2. Multi-channel capable.
    3. The encoder and decoder meet all ITU G.729 compliance and interoperability requirements.
    4. Can be integrated with echo cancellers.
    5. Capable of in-band synchronization.
    6. Available as part of Adaptive Digital’s G.PAK turnkey DSP software packages

     

    Platform

    G.729

    G.729 A

    G.729 B

    G.729 AB

    G.729 D

    G.729 F

    G.729 I & E

    TI TMS320C64x+ / C66x

    Available

    Available

    Available

    Available

    Available

    Available

     

    TI TMS320C67/674x

    Available

    Available

    Available

    Available

    Available

    Available

    Available

    TI TMS320C64x

    Available

    Available

    Available

    Available

    Available

    Available

     

    TI TMS320C62x

     

     

     

    Available

     

     

     

    TI TMS320C55x

    Available

    Available

    Available

    Available

    Available

     

     

    TI TMS320C54x

    Available

    Available

    Available

    Available

    Available

     

     

    ARM9E

     

     

     

    Available

     

     

     

    ARM11

     

     

     

    Available

     

     

     

    ARM Cortex A8

     

    Available

     

    Available

     

     

     

    ARM Cortex A9

     

    Available

     

    Available

     

     

     

    ARM Cortex A15

     

    Available

     

    Available

     

     

     

    ARM Cortex M3

     

    Available

     

    Available

     

     

     

    ARM Cortex M4

     

    Available

     

    Available

     

     

     

    Win32 Static**

     

     

     

    Available

    Available

     

     

    Win32 DLL**

     

    Available

     

    Available

    Available

     

     

     

    ** Windows 32 DLL - Contact Sales for specifications.

    DESCRIPTION

    The Adaptive Digital Technologies' G.729 voice coder software is an implementation of ITU Recommendation G.729 8 kbit/s CS-ACELP Speech Codec.

    G.729 is an umbrella of vocoder standards. The G.729 vocoders perform voice compression at bit rates that vary between 6.4 and 12.4 kbps. The figure below shows an example of the G.729 vocoder connected to a digital communication channel. The input speech is fed into the G.729 encoder as a stream of16-bit PCM samples, sampled at a rate of 8000 samples/second. The G.729 encoder compresses the data into the Encode Stream. The encoder also outputs the DTX status, which is discussed later in this data sheet. The digital channel carries the data stream and DTX status to the decoder, which regenerates a representation of the original speech, and outputs it as the output speech – again as 16-bit PCM at a sampling rate of 8000 samples/second. Since G.729 is a uses lossy compression, the output speech is not identical to the input speech.

    The decoder is also fed a frame erase flag, which is an indication that the decode stream has temporarily been corrupted. The decoder is able to “smooth over” the output , doing its best to conceal the loss of data and minimize the loss in voice quality. This process is known as packet loss concealment (PLC). It works surprisingly well even under high packet loss rates.

    Adaptive Digital's G.729AB voice compression algorithm is a highly optimized version of the G.729 ITU Annex A and Annex B standard. G.729 AB offers toll quality speech at a reasonably low bit rate of 8Kbps. The G.729 AB codec uses Discontinuous Transmission (DTX), Voice Activity Detection (VAD), and Comfort Noise Generation (CNG) to reduce bandwidth usage. G.729AB is used in wireless voice, voice-over-packet-networks, multimedia, and voice circuit multiplexing applications.

    Data sheet .pdf  

    Click here for G.729 information on the following topics. G.729 comparisons and differences.

    ✓ DECIPHERING THE MANY ANNEXES & APPENDICES of G.729

    ✓ PATENT ISSUES

    ✓ COMPARISON SHOPPING

     

    SPECIFICATIONS

    TI TMS320C6000

    G.729 C64x, C64x+ / C66x

    CPU UTILIZATION & MEMORY REQUIREMENTS

    All Memory usage is given in units of byte.

    Annex AB

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729AB C64x

    Enc

    5.2

    --

    --

    2400

    2148

    Dec

    1.2

    --

    --

    800

    2200

    Enc/Dec

    6.3

    63k

    6.7k

    3200

    4344

    G.729AB C64x+ / C66x

    Enc

    4.8

    --

    --

    2400

    2148

    Dec

    1.2

    --

    --

    800

    2200

    Enc/Dec

    6.0

    57k

    6.7k

    3200

    4344

     

    Annex D

    Function

    MIPS

    Program Memory

    Scratch Memory

    Per Channel Data Memory

    G.729D
    C64x

    Enc

    20.5 (8 kbps)
      17.1 (6.4 kbps)

    --

    --

    2392

    Dec

    4.1 (8 kbps)
     4.4 (6.4 kbps)

    --

    --

    1572

    Enc Dec

    24.6  (8 kbps)
      21.5 (6.4 kbps)

    124K

    8192

    3964

     

    Annex B & F

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729B / G.729F
    C64x

    Enc

    20.4

    --

    --

    8192

    2388

    Dec

    4.7

    --

    --

    0

    1568

    Enc Dec

    25.7

    119k

    7.2K

    8192

    3956

    G.729B / G.729F
    C64x
    + / C66x

    Enc

    19.6

    --

    --

    8192

    2388

    Dec

    5.1

    --

    --

    0

    1568

    Enc Dec

    24.7

    84k

    7.2K

    8192

    3956

     

    C674x

    CPU UTILIZATION & MEMORY REQUIREMENTS

    Annex AB

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729I*

    Enc

    33

    --

    --

    --

    3776

    Dec

    12

    --

    --

    --

    2560

    Enc/Dec

    45

    121k

    500

    8000

    6336

     

    CPU UTILIZATION & MEMORY REQUIREMENTS

    Annex AB

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729E

    Enc

    42

    --

    --

    --

    3776

    Dec

    18

    --

    --

    --

    2560

    Enc/Dec

    60

    174k

    500

    800

    6336

    *G.729  B, D, E - G.729 Annex I combines G 729 D (6.4kbps rate) , G729 (8kbps rate) and G729 E (11.8 kbps rate).  Annex B is integrated into all 3 rates. Giving 5 different possible rates: 0, 1.6k, 6.4k, 8k and 11.8k The 3 bit rates are switchable frame to frame by the host.


    C6x

    CPU UTILIZATION & MEMORY REQUIREMENTS

    Annex AB

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729AB C62x/67x

    Enc

    5.2

    --

    --

    2400

    2148

    Dec

    1.3

    --

    --

    800

    2200

    Enc/Dec

    6.5

    72k

    6.1k

    3200

    4344

     

    TI TMS320C5000

    G.729 C55x

    CPU UTILIZATION & MEMORY REQUIREMENTS

    All Memory usage is given in units of byte.

    C55x

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729AB

    Enc

    8.3

    28354

    9272

    1976

    2156

    Dec

    2.0

    13654

    6310

    436

    1848

     

    C55x

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729B

    Enc

    37

    33421

    9120

    4960

    2400

    Dec

    7.8

    1024

    1440

     

    C55x

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729D

    Enc

    32.2 (8 kbps)
    20.5 (6.4 kbps)

    24780

    6570

    4960

    1980

    Dec

    5.9 (8 kbps)
    6.4 (6.4 kbps)

    12607

    6574

    1024

    1416

    G.729D

    Enc/Dec

    38.1 (8 kbps)
    26.9 (6.4 kbps)

    28040

    6630

    4960

    3396

     

    G.729 C54x

    CPU UTILIZATION & MEMORY REQUIREMENTS

    All Memory usage is given in units of 16-bit word.

    C54x

    Function

    MIPS

    Common Program Memory

    Program Memory

    Data Memory

    Common Data Memory

    Per Channel Data Memory

    G.729

    Enc

    18.07

    2086

    6191

    194

    3100

    808

    Dec

    3.0

    2086

    2908

    113

    3100

    670

    G.729A

    Enc

    9.7

    2162

    6215

    194

    2899

    976

    Dec

    1.8

    2162

    1989

    113

    2899

    838

    G.729B

    Enc

    18.9

    4223

    8571

    194

    3401

    763

    Dec

    3.2

    4223

    3552

    113

    3401

    670

    G.729AB

    Enc

    10.0

    4236

    8567

    246

    3200

    931

    Dec

    2.2

    4236

    2625

    113

    3200

    838

     


    ARM ® DEVICES

    G.729 ARM Cortex-A8/A9/A15

    CPU UTILIZATION & MEMORY REQUIREMENTS

    All Memory usage is given in units of byte.

    Annex AB

    Function

    MIPS
    A8/A9/15

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729AB,

    G.729A

    Enc

    22.5

    --

    --

    2400

    2148

    Dec

    8.3

    --

    --

    800

    2200

    Enc/Dec

    30.8

    124.5K

    6080

    3200

    4348

    G.729 ARM Cortex-M3/M4

    CPU UTILIZATION & MEMORY REQUIREMENTS

    All Memory usage is given in units of byte.

    Annex AB

    Function

    MIPS
    M3/M4

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729AB,

    G.729A

    Enc

    25

    --

    --

    2400

    2148

    Dec

    11

    --

    --

    800

    2200

    Enc/Dec

    35

    73024

    6016

    3200

    4348

    G.729 ARM9E / ARM11

    CPU UTILIZATION & MEMORY REQUIREMENTS

    All Memory usage is given in units of byte.

    Annex AB

    Function

    MIPS

    Program Memory

    Data Memory

    Scratch Memory

    Per Channel Data Memory

    G.729AB

    G.729A

    Enc

    27.3

    --

    --

    2400

    2148

    Dec

    10.9

    --

    --

    800

    2200

    Enc/Dec

    38.2

    142.2k

    6016

    3200

    4348

     

     

    API function call summary

    G729_ADT_encodeInit(. . .)                Initializes the G.729 encoder software
    G729_ADT_decodeInit(. . .)                Initializes the G.729 encoder software
    G729_ADT_encode(. . .)                    Executes the G.729 encoder         
    G729_ADT_decode(. . .)                    Executes the G.729 decoder
    G729_ADT_Annex_(A. . .I)_encoderInit(. . .)   Initializes the G.729 (A. . .I)_ encoder software
    G729_ADT_Annex_(A. . .I)_decoderInit(. . .)   Initializes the G.729 (A. . .I)_ encoder software
    G729_ADT_Annex_(A. . .I)_encode(. . .)    Executes the G.729 (A. . .I)_ encoder    
    G729_ADT_Annex_(A. . .I)_decode(. . .)    Executes the G.729 (A. . .I)_ decoder

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  • 原文地址:https://www.cnblogs.com/gaozehua/p/4225178.html
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