Dolby Installation Guidelines

Installation Issues

 

 

 

 

3.2.2Dolby Digital

The amount of delay added by the Dolby Digital encode/decode process varies depending upon the sample rate being used. The table below shows the minimum delay values for encoding. The DP569 allows for the encoding delay to be increased to any value between the minimum value and 450 ms. The decode latency values are fixed, dependent on the bitstream detect mode of the DP562. The encoding delays are correct for v1.22 of the DP569 software. These are likely to change in later versions.

Table 3-1Dolby Digital Coding and Decoding Delays

Sample

DP569 Minimum

DP562 Latency in

DP562 Latency in

Rate

Coding Delay

Disabled/Reference Detect

Silent Switch Mode

48 kHz

179 ms

32 ms

36.6 ms

44.1 kHz

195 ms

35.7 ms

42.8 ms

32 kHz

268 ms

48.4 ms

58.3 ms

3.2.3Dolby E

The Dolby E encoding and decoding processes each add one frame of delay to the audio. The frame length is that of the incoming video reference signal. If the DP572 is in Program Play mode, then the decoding delay will vary depending on the rate of the incoming Dolby E bitstream.

The Dolby E units also have a PCM delay output. This can be used to route the PCM input to the PCM output adding the same delay as is being added by the Dolby E encode process. This can be used to keep a pair of un-encoded audio channels, such as channels three and four from a VTR, in sync with the encoded audio.

3.3Setup and Calibration

To allow correct monitoring of the encoded audio, the DP562 includes adjustments for settings such as analog output level trims and surround delays. For details of how these should be set, refer to the user manual.

The DP563 requires calibration with the studio’s operating level. For details of how to perform this calibration, refer to the user manual.

The DP570 has different setup options depending on whether the Cat. No. 548 Analog Option Card is fitted. With the analog board fitted the setup options are similar to the DP562. However the DP570 allows for multiple sets of speakers for which level trims can be assigned separately. The DP570 also includes EX decoding and can therefore support up to 7.1 speaker setups. For full details of setting up these speakers please refer to the user manual.

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Dolby Laboratories S01/13621 manual Setup and Calibration, Dolby Digital, Dolby E
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S01/13621 specifications

Dolby Laboratories, a leader in audio and visual technologies, has been at the forefront of sound innovation for decades. One of their notable patents is S01/13621, which encompasses a range of features and advancements designed to enhance audio experiences across various platforms. This patent marks a significant stride in audio encoding and decoding processes, contributing to various applications from cinema to home entertainment systems.

The primary feature of S01/13621 revolves around advanced audio compression technologies. These technologies are designed to deliver high-quality sound while minimizing data bandwidth requirements. The result is a more efficient transmission of audio signals, allowing for improved sound fidelity even in constrained environments. This feature is particularly beneficial for streaming services, where maintaining quality while using limited bandwidth is essential.

Another characteristic of the S01/13621 patent is its emphasis on spatial audio. By utilizing techniques such as object-based audio, Dolby enables sound designers and engineers to place audio elements in a three-dimensional sound space. This capability leads to a more immersive audio experience for the listener, making it feel as though they are part of the action, whether in a movie theater or at home.

Dolby’s innovative noise reduction and enhancement algorithms are also part of the S01/13621 technology suite. These algorithms intelligently analyze audio signals to remove unwanted noise while preserving the integrity of the original sound. This feature is crucial in environments where audio quality can be compromised, such as during live recordings or in lower-quality transmission systems.

Furthermore, S01/13621 includes compatibility with various audio formats and systems, ensuring that its advancements are accessible across a wide range of devices. From high-end home theater systems to portable media players, the technology caters to diverse hardware setups, allowing for a seamless audio experience regardless of the platform.

Overall, Dolby Laboratories' S01/13621 represents a robust blend of innovative audio technologies aimed at improving sound quality and user experience. Its features cater to the evolving demands of both content creators and consumers, solidifying Dolby's position as a pioneer in the audiovisual industry and continuously pushing the boundaries of audio excellence.
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