Hello,

I would like to better understand the high speed real-time streaming playback proposal.

The presentation material from last week’s meeting claims that “Currently, Real-Time Stream model is designed only for 1x speed.” However the current section 8 on real-time streaming in Mt Fuji is generic and does not make any mention of 1x speed.

Also, this presentation material shows a graph of data rate on radius with the data rate dropping below the “3x” data rate. There is however already in Mt Fuji the possibility for both the host to request the logical unit to exactly match the requested performance (exact bit of set performance) and for the logical unit to return performance descriptors to describe the same data rate on radius (get performance type field 00h). Accordingly it seems that in the sample sequence from the presentation step 2 is not necessary and all other steps can already be performed today:

“1. The host reads data on the media.

2. If the data requires high speed Real-Time Stream playback, the host

checks the ability by checking HSSR bit setting in Real-Time

Streaming Feature.

3. The host sets the minimum data rate by using SET STREAMING

command.

4. The host checks the minimum data rate by using GET

PERFORMANCE command.

5. The host issues READ (12) with Streaming bit = 1.”

Best regards,

David Burg.